Most terrible customer service in the world

I am so ****ed at Vodacom. I’ve been with them for almost 8 years and this is how they treat me. I opened a contract last year In December and a debit order went off that I didn’t recognise so I reversed it. Only to find out that it’s them and I went in store to make the payment 4 days later. Now 2months ago they bombarded me with sms’s claiming my account is in arrears. I called in to understand what they meant. They referred to the December issue & I explained that it was resolved on the 4th of January. Now they’ve cut off my data line & absolutely no one can help. Unbelievable and useless. I am definitely not continuing with this relationship. I’ll definitely be looking to take my money somewhere else.