pathetice service from outsurance and S/P

claim ***.As u are aware of the matter that still has not been finalised .I requested that you send your assessor in order for her to see the workmanship done at our premises .she visited us on Tuesday 17feb and I expected some sort of feedback from her or Nthabiseng Modisen .I have sent an email to Nthabiseng which was read but no response .I called in and received a call from the assessor named Jane who advised me that the service provider has visited our premises and that he blames the frame of door for problem we are having ,please note that your service provider made an appointment but failed to arrive and did not notify us. He further **** about visiting our premises and concluded that the above mentioned was the fault. Is it common practise for the assessor to let the supplier no that she is coming to our premises to view the workmanship? There is definitely a fault with the door and with the workmanship. please view photos taken by assessor .the service received is really shocking .your assessor also mentions that she cannot appoint some1 else to sort this out as the old service provider will be scoring. it shows that losing loyal clients doesn't bother use