GrandWest Casino lack of customer service

My son left his fone in the toilet and when realizing went back immediately only to find the cleaner gave the fone to someone else. Informing the security they send him to lost and found. Nothing. My issue is that it's been a week of emails and personally speaking to the staff at GrandWest Casino. No one has responded informing me of there investigation even the sit manager Mr Naicker has not responded. In the process of not resolving this issue I have lost al confidence in Sun international they can ban people for petty things but there own staff whether contract or permanent is there responsibility!! They have also lost five potential young clients with there mismanagement of this situation and word of mouth is a powerful tool. GrandWest Casino and Entertainment has lost all credibility and have no customer service or professional ethics