SERVICE NOT GOOD

I have a SAMSUNG GALAXY S5301 on contract, but my phone have not been working for over 9 months, it couldn't dial out nor receive calls and SMS's. And I have spoken to many CELLC STAFF on the phone, at the Shops in Alberton and CARLTON CENTRE hoping they will try and fix my phone which apparently couldn't read the sim. Because of them I have bought many SIM CARDS, because they all told me my SIM is damaged, only to find that even the new one is not working. I then took my phone for repairs at Calton Centre office on the 29/04/2015 and I was told I will receive an sms after 21 days has expired, and it's now 2 months and I haven't received the phone back (PRE619820). The other thing is that I have been paying R100 monthly instalments hoping I will get 100 free minutes monthly, but all these months the phone was not working, though I was paying, I was not getting any 100 free minutes as agreed. I need them to pay back my money or give me my free minutes for all these months I have been paying and not using my phone.