RCS stop robbing people

I once had a Jet account and in 2019 i decided to paid up the account and closed it lately in 2021 around August i start to receive calls from Jet my account is in areas. I told them that i dont have an account with Jet since I closed it in 2019. They said i must provide them with proof that i closed the account . Which i dont have cus when you close the account they dont give anything. Lately I was told by their lawyers that since Jet was take by RCS it charges the customers for having an account with them . So i must pay. This is a day light ******* to poor customers