No care for their customers

I think I have overstayed my welcome with Cellc, no satisfaction with their service after being a loyal customer for more than 10 years, I was retrenched last year March and I notified them to change method of payment from D/O to cash even went to Westgate mall branch to give them proof that I'm no longer working however they still debited me and charged me additional R50 for unpaid debit, I made a query with them and managed to get the R50 credit on my acc however I had more than 1 contract with Cellc and my open line contract was was still debiting despite numerous communication to change method of payment and more than once I was charged an additional R50 for every unpaid debit order, after numerous attempts to query the matter to no avail I decided to pay whatever that was outstanding since I wasn't getting any assistance from them, now 1 of my contracts was handed over to SSDA, I've made my 1st payment on the 29/07/2019 to their Nedback acc as instructed by SSDA and my 2nd payment on the 03/09/2019...sent pop to SSDA but till to date those payments are not updated by Cellc.... I can't wait to finish paying whatever I owe them and move to a service provider that will appreciate me as a customer.