"I wasn't prepared for the ridiculous services"

I wasn't prepared for the ridiculous services provided by General Corporation Services. I paid them in full and expected them to do a good job. Instead, the staff has never contacted me and continues to put off dealing with my problems. I don't know how to express my displeasure with their lack of professionalism. Nobody likes to throw away their hard-earned money; thus, I would never suggest their shoddy services to anybody I know!