Desperate

My car went to 4 Stroke earlier this year with a burst water pipe. Was repaired and we were assured there was no other damage. 4th Oct my car was taken back there when head gasket blew. 3 weeks later my car is still not back. We get no feedback and have to keep calling them. For the past week we have been told 'will be ready tomorrow'. 22nd Oct we were promised it would be ready Saturday. Still no car, only excuses and lies. My car was probably not checked properly after the burst pipe which led to this issue. I do not know how a company like this stays in business. No work ethics or customer service whatsoever.