bad service

I am very disappointed and unhappy with cell c. I have being using this network for a while now, form last year november my problem started, where i need to ipgrade my fone, but i like my huwaei p8 lite, so i just upgrade my sim, firstly they put the wrong contract through, they gave me a contact with 100 mins free only, where i asked for 1 gig of data and free mintues, then they were charging me for a handset that i did not receive, i was wondering why i was paying so much, when i queried with cell c was told you took a new phone, a huwaei p8 lite, i said that is my old fone, i just changed my sim, when they checked they said they can see on their side phone dispatched from warehouse, but no signature to say received from me, they keep calling me and ask me same question. I was billed from november 2017 till current, and up to date i did not get a reimbur*****t from cell c. very bad service.