A couple of things to note
1. he needs to talk to his accountant about 35 quid?
- sounds like he cant afford to pay you. His ""accountant" will at best do a few hours work for him once a year at most. So that is a bare face lie.
2. Dont moan about working in a bloody shop for 8 hours. SO what you got a small break, what else do you need, you are not doing physical work and if you got an hour what would you do with it once you had eaten save going on your phone? If you are already moaning about working for a living at your age you wont amount to to much. Just get on with it and make the most of the opportunity and if you dont like the work go and find another job, plenty around.
If the wages were stolen then he will just have to pay you from his own wallet. If he does not, leave.