Telkom day light *******

Telkom mobile will give u the worst service ever. I never really liked contracts for many reasons, but I gave it a go with Telkom Mobile since I was so desperate for a new phone and the deal looked great. The sales consultant was marvelous i believe she explained everything up to satisfory. I received my phone last week the 30 May 2019 . Samsung A50 for R299 contract. I got confused yesterday when I got an invoice already for R504.45, and on the 24th May 2019 they billed my account R299 as they said the amount has to be paid before delivering the phone. Now I called the customer service center more than 5 times no one is assisting nor giving clarity on the matter. They telling me stories that would get me off the phone. I regret ever dealing with such a company and need help to get off this mess.