When you fill the form in put all of this on your claim, number of hours spent on chasing them, times hourly rate, cost of phone calls, stamps, etc, also put interest charge on your total from the first day of your claim. Believe me it is very straight forward. I have won a few judgements in the SCC but most people/companys choose to settle BEFORE it gets to court and a few haven't bothered to turn up at court, so therefore you win the case. I wouldn't send emails, you can't beat good old fashioned letters, again make sure you send them recorded delivery and check after a few days whether they have received the letter. You seem to be worried about it all, just go for it, in my experience judges sitting in on these cases generally favour the 'small' guy and feel that there is no smoke without fire. I think that you have a good case but you must go about it the right way. 1) write a recorded delivery letter to either the manager of the shop, or head office, giving them 14 days to pay. 2) get down to the SCC and get the forms, study them and get everything together, paperwork, receipts, copies of emails etc. 3) if you're not sure get down to the citizens advice.