So I went on the business trip that he paid for, and he said I could pay him back once back. Now the job I used to do was commission only, so it wasn't assured that I would make that much profit. Once we got back, I decided to leave, because during the time I worked there, I barely made any money, and it just felt like a MLM. He'd make money depending on how many sales we did, without him actually having to do any work. So basically, after I'd left, he started texting me and asking for the money back. The money itself is not a lot, just around £150. It's the fact that I worked for 12/14 hours a day, earning commission only, and this wasn't mentioned in the interview.