Vodacom

I have contacted Vodacom cancelation dept in advance to cancel one of my contracts which was due to expire end of Feb 2024. I explained to them that she emigrated to NZ. The lady convinced me to take a cheaper contract, and I was such a good customer for so many years. I did not wish to extend it, but in the end I agreed. The contract would have been halve of the prize and I acceted. From end of March I should have paid halve the bill than before. I am still billed the amount of the previous contract. I phoned costumer care and they directed my caĺl to a different department. The guy told me that they have corrected the mistake and that my account will be credited. When I checked beginning of May, the amount was still the same of the previous contract. I phoned again and the lady informed me that it will be corrected, because the previous person have put in the wrong date. I just checked my bill, I am stille being billed for the full amount and no refund