Безопасен ли bdo.ca?

While dealing with these people initially everything was cordial and polite and quite informative but I'm now finding that letters are being set to me asking if I have questions to call. When I call nobody is there to accept it. I leave voice mail and nobody returns the call. Important financial and legal obligations cannot be met because BDO staff are not returning calls or providing information to Revenue Canada as I understand they are supposed to. I would not recommend this company for any financial dealings.