worst servic ever and i have been a loyal client

I have been a client of cell since they opened and I am disgusted that the standard of service has dropped so badly. I took upgraded my contract a few months ago and took the s mini , needless to say that I have had endless problems , calls cut, battery power , no reception, and the problems continue , contacted Cape town cell c head office .. oops sorry we can't assist but will get someone to call you , months later and the problem just gets worse. I am going to change service provides. Can we get this resolved