R in Calgary

Unfortunately my condo uses this company so I contacted them to come for excessive heat in which their tech came and I was only supposed to get charged 150 but I wake up to being charged 385 and the worst part is nobody in the company can tell me why all Ive been told is to contact my condo board and they will hopefully wave it ? How unprofessional that a company cant even tell me why I was charged more then double the quote for a tech to come and not even fix anything just turn off the heat how ridiculous! These people are dishonest and I would highly not recommend them