Disgusting lack of service from Shane and Ernesto Malaj for a paid customer

The First Initial Gas Geyser Installation went ok apart from the ******* pricing, that was in April which they installed 2 x 19kg bottles for a 20lt gas geyser. The about 3 months later I decided to upgrade to 2 x 48kg bottles as the 2 x 19kg was being used up too fast. After Negotiating with Ernesto Malaj in sales, we came to an agreed amount that suited us both with an updated CoC in the price. The work was carried out ok but they messed me around with the CoC, first telling me that they could not come due to the COC person having personal problems then to forgetting the actual appointment, then rearaging a new appointment. We wiated almost 2 hours past the time they were supposed to show up, then i get a call from a guy called Shane who says i must send him some pictures of the installation and he will decide if he should come out to inspect it. I did so, he said it looked ok to him and that he will issue the CoC. It has been almost 2 weeks since then, I sent a mail to Ernesto Malaj about it, then Shane called me to say he sent it in and that it was being delayed by some other deciding part and that I must not bug him or Ernesto Malaj anymore as they have done thier "jobs". Come on guys, I am the customer who has already paid and it has nothing to do with me with whoever's department is lagging, push them for answers, not me!