Edgars is USELESS!!!

My account was closed on the 14th of December 2020. I paid the balance owing of R110. I personally went instore to the Canal walk branch and closed the account. My Edgars card was promptly destroyed - cut up. Since then, I have received a statement EVERY month for monthly charges levied on a “closed” account. And EVERY month I have phoned Edgars to query this. EVERY month one of their call centre agents tells me that they will sort it out. I phoned last week (yet again!) and was told that all had been resolved and that my email address would be removed from their data base and mailing list etc. Tonight I receive yet another statement for April. This is just beyond ridiculous!! So I phoned today....again. NOW I am being told that the account is not closed due to an outstanding mobile service charge on the account. What???! How is Edgars STILL charging account fees on a closed account? I have sent at least 10 emails and made umpteen (20 at least!) phone calls. I am getting NOWHERE!!!! This experience has just been excruciating!