@Lawrence ******
okay thank you, I saw a couple people cancelled from a different office, so I'm wondering how they did that, I'll definitely return to Bangkok and Chiang Mai at some point, but my visa was issued in Phuket, I probably would never visit Phuket again, only for the purpose of cancellation if necessarry.
I do have 2 passports for 2 different countries, but I'm pretty sure all my information will be attached to both, and I can't return on a tourist visa on one passport, whilst cancelling the visa attached to the other.