Dstv. bad service

Dear Sir, I was on explora contract for 2 years. My contract expired 3rd March. This was the last payment due. On the 2nd of April R800 was deducted from my bank account, but when I wanted my Tv activated the R800 was no where to be found. After numerous phone calls to dstv eventually I could activate toward the end of May 2019. I the lady confirmed there was an R800 credit due to me. I had my TV activated towards the end of May and I explained that I was going away for a month in June. The amount payable was R167.00 I then phoned on the 2nd of June to have my tv disconnected for the month. This was done as the next day I had no TV . I came back on 3rd July 2019 and asked form my TV to be activated, just to find that the R601.00 credited disappeared from my account. Up to now nothing has been done, and no one calls back. I am so disappointed with DSTV Multichoice. I hope someone at Multichoice will see my message and sort this out.