Unhappy client

I took my Jeep to contstia kloof branch for sensor wheel speed repair 2016-11-01 and after they diagnosed the vehicle they informed me that the car needs a new rear abs sensor, handbrake and instrument cluster of speedometer must be replaced. I gave a go ahead and paid R4170.96 for the repairs. The Vehicle was released on 2016-11-04. On 2016-11-05 the same warning lights came back and i again took the vehicle back and it kept on giving me same problem until mr Shaib who is a service advisor said i must fix the diff so they can continue to repair the fault, i took the vehicle to Delport deef for the required diff repair which cost me R9500. I took the vehicle back to Arnold Chatz Cars as per their instruction. I was told that i must pay a further R7000 for them to reopen the diff, i refused cause it had a guarantee from Delport. They refused to fixe my car or give me my money back. I then filed a case with Legal wise as i am a member, Mr Makhani Thina was assigned to assist me claim back my money but he only advised me to file a complain with the Motor Industry Ombudsmen, i did file a complain and up until this date i never got assistance from them, Legal Wise or Arnold Chatz Cars. I need a refund as the service i paid for was never done. I have all the supporting documents of these events.