Chery Menlyn Bad Service

I reported my car seat defect a year ago and to date still have not been assisted. I have been calling Chery Menlyn and leaving messages and no one is returning my calls. This is disheartening for a client who has been servicing their vehicle there from day 1 and always gave great compliments on their service. I did my last service at the Centurion branch and when they checked on their system, my claim was approved for the seats to be repaired yet no one at Chery Menlyn is getting back to me a year from the date the issue was reported. I have left a handful of messages and was promised assistance but to date no one has returned my calls. This is frustrating and I'm afraid this is being delayed so that my car falls out of warranty and Chery gets to not cover the repairs.