Pathetic Service from Service Provider (Inso Aluminium)

Inso was appointed by PG Aluminium Head Office to do repairs at our house in Midrand. They send their technician who got all scope of work and they returned with a quotation which required 50% deposit and balance on completion. We waited for about 2 weeks a day before the scheduled date they decided to request balance of payment before any work was done. And initially they started by saying our kitchen door was not quoted properly it was suppose to be a new door and they had quoted only parts of the door which contradicted with their Technician that came who even confirmed in writing to us that all information was given to Charmain to quote properly, we told them to remove the door and continue with the rest. A week later after submitting a revised quote without the kitchen door, they decided to dump our project and they gladly gave us back our deposit all time wasted waiting for them to start on the job only to release they were no longer interested in doing the job for whatever reason we don't know. If they were not interested they should not have quoted, requested us to pay a deposit only to refund us after more than 2 weeks, possibly they wanted funds to push another project at our expense to pay us back when they got paid, this is not a trustworthy company to deal with. These are the kind of suppliers that will not finish your jobs, beware.