Telkom mobile is a ****

I have a data contract with telkom for R150.54 a month, i took a contract while i was working under 2 years contract, then my contract ended and I was without work for 3 months, on my last month at work I called all the companies I have debit orders with and informed them of my situation and requested to stop the debit orders becausei will be paying all my contracts manually, telkom told me they can't stop the debit order but they can only shift the payment dates, I said to them I will pay them manually because I couldn't ensure availability of funds on the debit order date, the first month i had funds so they debited, second month i made a manual payment and the debit order bounced, the following month I paid again and they still went to debit which bounced then I started seeing my bill going up to almost 3 times the monthly subscription, when I ask they told me it was for the unpaid debit order, I told them I paid already and they said it doesn't matter because the money hadn't reflected in their side, I let them know I couldn't afford the extra charges because I am unemployed still they said no help for me, please please I need help with this **** COMPANY, we can not have a system that only favors the company but not its clients, if someone is not working where should they get the money for extra charges which are made intentionally to enrich the company? SHOULD A CLIENT GO ROB THE BANK OR WHAT? TELKOM MOBILE IS A ****, THEY EXIST TO BANKRUPT PEOPLE. PLEASE PLEASE HELP ME STOP THIS NIGHTMARE.