Unacceptable standards for Sun international

There was several complaints at the time of book in, however my main complaint was being informed that they place uneaten or half eaten food back onto the buffets for other guests as their policy, 2ndly that we were checked into an occupied room (given keys and access to others valuables) 3rd the attitude of most of the staff was arrogant when assistance was needed I've complained at the resort prior to checking out and during the stay. Management have been emailed and contacted however after acknowledging the 1st email on the 8_08_17 there has been no response or assistance from Sun international