Do not trust Lightstone to value your property on behalf of Discovery Bank

This is according to Discovery Bank a reputable company that does home valuations. They have valued my house, that I bought 20 years ago, for 1 million rand; did 1-million-rands of improvements to now be valued at 1.7 million till November 2027 So they believe that the value of the property will not increase in the next 3 years. Apart from that, this so-called reputable company NEVER contacted me regarding improvements made or came to my house or contacted and arranged to come and see the house. In my opinion the lower they value the property; the less points Discovery Bank gives you, so Discovery Bank scores and you lose - seems a bit like a conflict of interest. Something is VERY wrong here