Subpar communication

It was a quick sale. On the market 4 days before signing a contract. However there was a few things NOT disclosed to us PRIOR to signing the contract which should have been. Communication was average, with delays in getting copies of signed contract to us/our lawyer. We had to request when pre-settlement inspection would be 2 days out from settlement as we had not heard, and the owner was there for the inspection too. To top it off the key was left under a bin at handover and there has not even been a Thank you/congratulations card or email on buying the house - surely that's just simple courtesy. It feels as though he has done the bare minimum to sell this house. The Ray White conceirge team have not even followed up after I booked a phone call request with their team either. Overall our experience has not been a positive one.