A very unhappy client

I tried to get a phone by applying online and they gave me a call on the 17th of May 2023 on Thursday the DSV company phoned and I booked the delivery for Friday. On the 19th of May, I was supposed to receive the phone at around 12. Nothing happened no SMS or anything to say my order was on its way so I phoned DSV and they said my service provider cancelled my order, so I phone MTN and they said I cancelled my order, which I never did. Saturday I went in to Springs Mall MTN ( they were amazing)explained unforutanly the can't help as it is an online order and I will need to phone customer care on Monday. Tried to phone and they kept putting me to different departments I finally get put to customer care and the Lady was so rude and said she can't help she put me through to sales and the sales lady couldn't help and said I need to cancel through the courier company, she put me through to the courier company and that lady said the phone was back on its way to MTN, I am so disappointed, this was going be the first phone that I was getting, yet MTN doesn't want to help me get the problem sorted. No answers to my questions, calls or emails. I am so angry. I want answers