Worst customer service ever!!!

I bought a phone from Fonechoice. The phone was ****** in a house burglary and I sent a claim to Fonechoice because the phone was insured. Insurance approved my claim and they sent me on old second hand phone with cracks and scratches. I was so disappointed and sent the phone back to them. They apologised for their mistake and told me that they will send a new phone. That was in September 2014. I kept following up with them when months passed and I still haven't received the phone. I eventually stopped calling because whenever I phoned they will tell me the phone is in despatch. Last week a salesperson from Fonechoice phones about a special they have and I told them I won't ever buy anything from them again because I am still waiting for my phone and still paying on it. I was again told it was in despatch. This week they deliver the same second hand phone, in a worse condition. The box not sealed, dirty, more cracks and scratches as if the phone was used by someone after I sent it back. I am not going to leave this there. Fonechoice is abusing my rights as a consumer. If there is somebody to help me fix this mess please do before I take it further. I'm still paying for the phone.