Returned damaged phone

On the 04th of March 2017 I purchased a cell phone on credit at Markham Orange farm, on the 27th of August 2017 I returned it back to them for repairs, on the 06th of Sep they still had the phone with them and had not taken it for repairs, after two weeks they called me to come get my phone, I went there, the phone was not fixed, it still has the same problem, and a guy that assisted me apologized and said had I found him, he would have written the correct information so that the people who fixes phones would know what the phones problem is, and he said he will take it back with the correct fault description and within two weeks the phone would come back fixed. After three weeks they have not called me to come get my phone, I decide to go there on the 09th of October 2017, they told me that my phone is not back as yet, I ask them now what am I supposed to do, it's been two months now I don't have a phone, this guy tell me that he will call them where they fixed phones and the next day they will call me with a solution, just as I has left, in a taxi going to bara, they called me to say sorry the phone is there at the store, I must come back to take it, 15 minutes after that, that guy calls me again to tell me that my phone is still not fixed and I still don't have a phone but I am paying them for it. Please please help me as to how do I sort this issue out.

If u can assist, please call me on ********** 608 Email: **********