I have been sold a faulty product from MotoMia

3 months ago I purchased a Corretta 200cc from MotoMia, after a while of owning it, it gave problems. I have sent it in for repairs for the 5th time now, I started a new job at the same time and need the bike as my main transport. By the 4th time I sent it in my boss was so upset of me not being able to go to work that he came with me to the branch in Hillfox to see what is happening and why the bike is being sent in for the exact same problem without being resolved. When I went to the Kempton branch for the 2nd time I was told I do not have enough riding experience therefor there is nothing wrong with the bike. My bike has been sitting at the Centurion branch for 2 weeks now and next week will be the 3rd week. I'm forced to take unpaid leave as I cannot get to work so I'm loosing money as well as getting a bad status at my new job, I was also told they cannot replace my bike with a new one they will fix it, I'm not unhappy with any of the staff I dealt with besides in Kemptonpark - but I'm being put in a position where I can loose my job because MotoMia cannot repair what they sell. I'm thinking of sue-ing for the income I'm loosing and the un-needed stress aspects palced on me.