Very very very very ......poor

I had a cell phone contract with Vodacom and was supposed to come to an end this year in March, but last year a weak before Black Friday, I went to the Vodacom store ( The Glen, JHB) and asked the quote so that I can settle my account. The store gave me the settlement amount (which I paid) and a week later (On Black Friday), I went to the same store trying to buy something on contract, but the manager (who was assisting me personally) checked on the system and said I didn't have a contract with them and will have to open a totally new contract. So I decided to open a new contract with other network provider. Only for Vodacom to keep calling me in January saying I owe them and still have a contract with the. I've logged queries and my number was deactivated and activated several times but up to now there's no help from their side. I've tried calling their customer services, tried them on twitter ( via DMs) and even send them an email (customer services) but nothing happened up to this day.