DC Commercial Sales is so *******

There is a company called DC sales also known as DC COMMERCIAL SALES dealing in truck and trailer sales,I gave them a client who bought 2 trucks and we had agreed on them to pay me R15 000 rands commission per truck ,now it’s been a month since the deal was done and they don’t want to pay me my commission.The guy calls himself Marius but on true caller the number appears as Darius Masks .his numbers are *** and ***