Initial service and installation was good although at a slightly higher market price. I spoke to the team about ongoing issues I having as quite often the door would not open electronically, but then needed to get into it in a hurry so I opened it manually. A couple of days later it wouldn't open again so I called them out but as it sounded like a warranty claim I would not be charged. I live 3 miles south of Norwich and the team came the next day and inspected the door. They were at my property for no more than 5 mins and stated that due to a trailing lead I had under the door to my caravan the door was intermittently malfunctioning. I explained that this issue has gone on since last Summer and I have only had the lead going under for 2 weeks but they had made their mind up and said I need to remove it and see if the problem goes. I said why was I not asked about this before coming out and they did not know and confirmed that I would not be charged. A few days later I have received an invoice for £150.00 call out charge. After several conversations and emails they have held firm and do not accept that this could be an intermittent fault and are not prepared to drop the charge even though I am only a few miles away from them and they were on-site for 5 mins. £150 seems a little excessive!!!!!! Annoyingly, they have also stated that once I remove the wire (which I have done) they will not reimburse me this charge if it happens again although it would be the same issue as originally enquired about.