Stove installation

I had a stove that was to be installed. When the technician arrived, he informed me that he only responsible for the gas fitment and not the electric part. I phoned SAMSUNG and was informed that the technician must not do anything and that they will phone back. I am still waiting on the call. Due to loadshedding and the stove being gas as well as the non-response from SAMSUNG, i was forced to pay another qualified technician to install the stove. Now i was informed that my warrantee was voided because i used another service provider. Pathetic service.