Horrible service from Builders Warehouse Midrand

I purchased a shower from Builders Warehouse, Midrand, earlier this month (May). The shower was installed without incident. Slightly more than a week after the installation of the shower, the shower door exploded. There was, thankfully, no one using the shower at the time the door exploded, sending glass fragments frying all over the bathroom. My attempts to resolve the issue with Builders Warehouse have thus far not borne any fruit. Their Manager has hung up on me on the phone on two separate occasions.