Meritnation — forcing to continue with them

I had taken meritnation pack for my daughter two years back for which while demo they promised the world and even on whatsapp they kept saying u will rcv the hard copies but nothing came and when i complained no one was ready to take the responsibility. They keep calling too many times from different numbers and thru different people even after telling them i m not interested anymore. This time it was heights when a lady called me up and she is like u have to listen to me. Heights was this call was for the package i had taken for my son who was in 11th standard two years back and she is telling me u haven't renewed the package. I said u all don't even trust on ur own studies that a child can pass 12th with meritnation studies that's why u r asking for renewal knowing that the package was for two years and when i had taken it two years back means the child must have passed 12th this year. And when i disconnected the phone she kept on calling continuously till the time i didn't pick up the phone and shouted on her. I told her don't u understand that i m disconnecting the phone means i m not interested. She is like no u have to listen to me. They r quite irritating people and i would request everyone pls b aware of these people. They will promise u the world while taking the money. Once money is gone to them then they will not solve any problem o[censored]rs.