Hisense Poor Service in crediting Smart TV under warranty

Our Smart TV is still in warranty and is irreparable. Hisense outsource repairs to substandard suppliers. We boxed the TV as delivered and it was not returned the same way - all the clips were missing and manner in which the TV's were stacked in the vehicle was simply unacceptable. I wasted the entire day waiting for the return, thinking it was fixed, only to be informed it is irreparable. Now despite following up continuously the credit has not come through and the TV is still not collected - this is unacceptable. My intention was to replace with another Hisense, but given this poor service, will seek alternative brands.