Bad Service

I bought an Totem XC100 29" on: August 2017 i Had it for 2months, it started giving me problems, I then took the bike back to Makro Woodmead and was told they gonna repair it, I then advised the sales person I don't want the bike, they must credit me I will buy the smaller bike and pay the additional R200. whereas I bought the bike XC100 29" for R999.(August 2017) I then bought the Totem XC100 27'5 7 November 2017 I had the bike (Totem XC100 26'5) for 3 months than started giving the same problem the previous bike gave me. I took it back to Makro Woodmed for reapirs, spoke to the sales person, he then advised me to write what the fault was on my fault report (Barcode: ********** 091059). I signed the fault report 5 march 2018. I then received a Makro Assessment ref ********** 9 March 2018 to say my product was recieved. Than i received a sms the 19 March 2018 to say the repair agent has quoted to repair my product. i then rejected the quote due to my fault report according to me and the sales person. that was my last communication barrier with the Woodmed branch. I then called yesterday to hear how far is my product as i was told Makro will get back to me regarding the additional charge of something i was not aware of. I would kindly like to credit the bike purchased 7 November 2017 than add cash to buy a better bike. The manager in the bike department could not help me today 18 April 2018.