Questionable credibility

We had work done by Garfield electrical and satellite in April/May 2023. First, I will say that the work done, was generally acceptable. However, on 5 May 2023 Mr. Garth L Smith sent through an invoice before all of the work was completed as per the quotation and demanded full payment prior to all the work being completed and issuing the COC. We paid for the work that was completed including the cost of the COC and attempted to communicate that the work was incomplete and that we will pay the remainder of the invoice value as soon as the remainder of the work was completed. Mr. Garth L Smith was unwilling and uninterested in our attempts to communicate this and also refused to issue the COC as legally required. It came to light later on that they had made an ******* connection with the geyer which I also spoke to him about. And now I am fairly convinced that he was aware of this ******* connection and that this is the real reason he has been refusing to issue a COC for the work done. Garfield Electrical refused to refund the monies paid specifically for the COC. I attempted to get the issues resolved with Mr. Garth L Smith and he “agreed” to sit down with me to compare documents and notes only to ignore me afterwards. So after several attempts to get this matter sorted out between us and suspecting that he had no interest in resolving this matter I sent Mr. Garth L Smith a message inviting him for a last time to sit with me in order to resolve this matter and stating that I would be logging a complaint with the Department of Labour should he fail to come to the party. Mr. Garth L Smith responded by threating, attempting to intimidate me and projecting his own actions onto me and my mother. I have subsequently logged a complaint with the Department of Labour and the matter in now in process.