Refund

Trafalgar property management owes me a refund of R16292 for a deal I cancel because they never gave me my property key but up until now there are refusing to give me my key (Trafalgar property management Durban branch) Management Tyran Benjamin and Crstelene Govender are claiming that they already got paid commission on a cancel deal ,so I don't know what should I do to obtain my funds as a small business man in Durban