Power Glide Engine Oil - Seized Engine

We purchased a container of engine oil from Midas PMB called power glide. It was put into the car and caused the engine to seize. on returning to Midas they got us to purchase a flushing agent which didn't work. The people from Power Glide after 2 weeks came to fetch a sample of the oil drained and say the sample is too small and we would have to pay for the testing ourselves. Please can you ensure that Midas only stocks reputable products. Can Midas in any way assist in dealing with Power Glide as the oil was purchased from Midas? At the moment Wayne isnt working due to his vehicle being out of commission. <br>