Edgars assistance/feedback needed urgently

Early 2020 I was charged interest for late charges on my account, I did pay short in a previous month as I could not find my statement when I had to pay so just paid a random amount. I therefore paid the full interest charges and the amount owing on my account, so I settled my account. I then sent a query on how the interest charges were calculated as it did not tie up to the outstanding amount, I followed up on numerous occassions with no feedback. A few months later I made another purchase on my account and waited to pay till I received feedback from Edgars on my account query from earlier in the year. I have been fighting with Edgars/RCS since 2020 on the outstanding balance as I have paid my account in full besides for the charges where no feedback was received. I take every call that RCS makes to me, I send email after email, I have called in and I have been into a branch but nobody is wiling to assist me. The consultants can't assist me and can't put me through to a supervisor as they are working from home. The conform they will get a supervisor to call back but a supervisor never calls back. My account has now accumulated interest charges, late penalty charges, and numerous other charges which I refuse to pay. I am being forced to pay an amount which cannot be explained to me. When I paid it and queried it, nobody assisted. When I don't pay I still get no assistance, just further charges. I feel bul**** into paying this amount as nobody can/is willing to assist me. Now I am left with more charges which I just have to pay. This is unacceptable. Also, RCS charges a monthly fee even though you have no outstanding balance, this was not the case with Edgars and I did not agree to this. I usually make purchases on my account and pay it off over 2/3 months so I am not happy to have a monthly charge as most of the time I don't have a balance on my account. I will settle the initial interest charges once someone gets back to me on how this was calculated. For the other charges, (interest and penalties) this should not be for my account as I have received no assistance form RSC in the matter and my account is overdue to no assistance received from RSC/Edgars. Please can someone contact me so that I can settle and close my account.