Worms in the meat

On the 1st of January my husband bought meat from Checkers at RiverWalk in Vereeniging. We never buy meat from them as we have already had 2 instances where we bought meat from them that was completely off. But as it was new years day and all the butchery's were closed, we had no other choice than to buy meat from them. My husband himself took the meat from the package and cleaned it before cooking it. Without adding anything but kettle water and salt into the pot, he cooked it at high pressure for 30minutes. When the time was up and he opened the pot he saw strange things floating in the oily water. He took a s****ful out and after very close examination, noted that it was worms. It could only come from the meat as the pot was clean and nothing else was added to the meat. We are appalled. Never ever will we ever again buy meat from Checkers, and also advise everyone else we know to do the same. It's disgusting!