Technician wrecked my wall

Hi, <br> <br> I have been complaining about this for quite some time but no action has been taken by the call centre. <br> I had an ADSL line installed in my house in March and this involved the drilling of a hole in my wall. The only problem is that the technician bungled the initial hole which he first drilled because it was too narrow. He then decided to drill a second one. I wasn't at home at the time and he had the audacity to tell my younger sibling 'To buy Polyfila and fix it'. <br> <br> A few days later the technician gave me an awkward call where he seemed to be indirectly asking for a favour. I dismissed that and told him I wanted him to fix my wall. He promised he would hire a professional out of his own pocket and promised to call me back. He never did and never answered my calls. I have been complaining using the call centre since but nothing is ever done. I've also <br> <br> The technician's name is France and his number is ***. <br> I'm not going to let go of this. Please sort it out. <br>