As an online retailer, we do not have a technical team that is able to visit your property, it is not a service we are able to offer.
Some of the brands we deal with do have technical teams that can attend properties but this is not all brands. Generally, for a brand to send a technical team there would be a charge for this service upfront. Once they confirm the fault this is then refunded to you. This is to protect the brands from problems that are a result of the fitting, which is why we would always recommend your plumber/fitter attends to inspect the problem first. Any booking of a brands technical team would be a separate contract between you and the brand.