Hathway — Too many calls after plan expiry, and even after plan termination

I am getting too many calls for my plan is expired and to get it recharged, each day I am getting around 2 or 3 calls, it is very frustrating but had too pick calls because don't want to miss the important one. I gave my reason twice or thrice, and expecting not to get other call, but it doesn't matter, i am still getting calls, it has so annoyed me and have to make a decision to terminate the connection and i did same, the ticket was raised and acknowledged from the other side, but these calls are not stopping, still i am getting the calls with same frequency, twice or thrice in a day atleast.

I want these to be stopped in a immediate action.