Why Congress still remains silent on the defection of 8 MLAs from their party?

‘In Indian politics nothing is possible’ – former Chief Minister of Manipur Radhabinod Koijam once said to reporters before he took oath on   February 15, 2001. Saying so, the bindings of the constitution of India cannot be overridden by any of the citizen including the elected representatives called MLAs or Ministers. Numbers matter in democracy to form government, but as stated by former CM Radhabinod Koijam, it was made possible for the BJP to form a government here in the state even though it bagged only 21 seats in the assembly election. Congress party which bagged 28 seats failed to come back to power as it failed to control its members elected in the election who had parted violating the constitutional provisions provided under the Anti defection Law.
Th. Shyamkumar, the Forest Minister, was the first Congress MLA to join BJP.  He joined BJP even before being sworn in as MLA. He was sworn in as Cabinet Minister at Raj Bhavan along with others on March 15 this year.  On April 18, Congress MLA Ginsuanhau Zou joined BJP. Four more Congress MLAs – Y Surchandra, Ngamthang Haokip, O Lukhoi and S Bira joined the BJP on April 28. Another two Congress MLAs Kshetrimayum Biren Singh and Paonam Brojen joined the BJP on July 17.  
With the joining of the 8 Congress MLAs to BJP, the number of Congress MLAs has been reduced to 20.
Congress party is the oldest political party in the country. People across the country have high respect for this political party over its commitment to protect and safeguard the constitution of India.
When BJP comes to power, people are not upset on realizing that the Congress party will play constructive role of opposition. In democracy a strong opposition is what people has been expecting and with the present numbers, Congress is a strong opposition in the house of 60.
Protecting the 10th Schedule of the Indian constitution is also what is expected from the oldest political party. But for reason best known the political party is not following any procedure to protect the constitutional provision.
A candidate will be disqualified if he wins election on one party ticket and joins other party after win under Anti- defection law. Anti- defection law was introduced by 52nd amendment act, 1985 and it was also added in constitution as 10th schedule. Having known it, none of the members of the Congress had applied for disqualification of these elected representatives even after 7 months plus some few days.  It was only against Th. Shyamkumar that a petition for disqualification had been reported filed. But till now no move or campaign is seen to speed up the case.
Lately a disqualification case has been filed against MLA Y Surchandra to the Speaker’s tribunal but by a voter from Kakching Assembly constituency and not from the political party he had defected.
The congress party is now busy staging non-stop protest demanding reveal of contents of Frame Work agreement. Well and good as it is in the interest of the people of the state. But then it seems rather an election campaign for the upcoming Lok Sabha Election . Why the Congress party is still quite on the issue of their MLAs defections? Ignoring such a matter is something like saying that the party is not concern about protecting the Constitution of India.
Yes, in politics everything is possible. Who knows these defected members return again after seeing the result of the Gujarat election? Is this the reason for the ignorance? If so, no political party is worth respecting as they don’t give a damn of the constitution of India.