Think twice before signing a contract with Vodacom

I have been a loyal customer with vodacom for 5 years but i am so disapointed in the manner in which they treat customers. I lost my job last year and had 2 contracts with Vodacom i missed payments for 2 months as i was not employed at the time however when i did eventually start working again i paid up my arrears and everything was up to date. Now that one of the two contracts has expired they still charge me money and demand payment so i asked one of their customer agents why I am being invoiced for an expired contract which is paid in full. The response was that because i had previously failed to pay the 2 months i skipped they added those two months to the contract and argued that i had paid my arrears and my contract was up to date. Of which the contract i have with them doesnt say this at all therefore it is ******* and they are *****ing from people I am busy right now looking at the legalities of the matter and considering my options. Think twice before signing a contract with Vodacom