Cell C bad service

I had a contract for 2 years with cell c and didn't have any problems. I upgraded my contract and took 2 contract deals that I had for 1 year until lockdown started. I contacted cell c via email and called numerous times because I wasn't able to pay my installments. I have basically been loyal without failed debut orders for 3 years. All I asked for was a payment break during lockdown because I wasn't working or getting paid. They failed to acknowledge my gesture and simply tried to debit from April month and still. I've tried several times to get ahold of cell c so I could make payment arrangements but with no avail. My installment monthly is R529 and I was now in arrears by 3 months. I owed them R1587 but they added interest and tried to debit R1729 by end of June. The debit order bounced and still no contact from them. I started working again on 1 July then on 25 July cell c debited R1729 twice and still tried to debit an installment of R529. That is R3987 for 4 months payments that should've been R2116. I don't want to be blacklisted but if cell c fails to allow me to make a payment arrangement then I will stop paying them. This is just pathetic that I have to struggle to make a payment arrangement and call after them but they don't make an effort to help loyal customers. They suspended my services April month after the 1st debit order bounced but I did make contact with them and just didn't get a response.