Fibre refund

Bad experience i paid for ibre installation in June 11 throughh a subcontractor fibre couldn't be installed my area is blocked because of being high risk now I'm getting a round for my refund its been 3months im told this im told that and you can imagine i was told iys by the manager to authorise via whatsapp all of the sudden they want proog of payment yhe subcontractor confirmed all documentsbwrre receive have failed me as a paying client Vumatel you have failed TCF .Vumatel pay my refund with interest with immediate to my bank account as you have my personal details with immediate effect i paid you to render a service which you couldn't and stop taking peoples money knowing the areas are blocked to increase sales that is being cruel