I noticed a couple of items that were incorrect & e-mailed these to the provider. I asked for the bill to be amended to reflect the correct balance. The person I was dealing with the whole way through the build would not give me a call to discuss the items. There was one item within the build that was charged for twice, despite it being already included in a batch of items. The hardware shop disputed this, so I found a what's app message to the person the shop that supported the fact I was over charged. So I basically told them in my e-mail that once that was deducted, I would pay the final €1700 straight away.