The provider failed to deliver as per the contract

We paid Masindi Roof Trusss an amount of R106 700 for the erection of roof trusses, roof sheets and tiles on the 10th March but to this day they have not delivered as per the contract signed with them. They have been lying to us in conjunction with the company that is supposed to manufacture the trusses which is called Roof Span owned by a Mr Barnard.