I'm a bit ashamed to say this out loud (OK, so type it), but I'm being charged £1,300 for one tile to be replaced on my roof that took all of 22 minutes to do (plus 45 mins to errect scaffold). I'v seen these horrible things happen to old folk, but I'm not sure what to do. Yes, I know trades people are paid for what they know, not necessarily the time it takes to complete a job, but £1,300? I've paid half (upfront) but not sure what to do. feeling a bit anxious!