Crypto capital gains international question

Crypto bought with a “uk wallet” on coinbase. I am not longer a uk tax resident, I am not a Canadian tax resident. If cashing out some money from crypto sales, do I pay capital gains tax in the uk or canada?

Hi,
Based on what you have stated, the deposit you have effectively had to pay back to the prospective buyer, does not meet the wholly & exclusively rules:
CG15250 - Expenditure: incidental costs of acquisition and disposal
CG15160 - Expenditure: categories of allowable expenditure
You do state that they settled for an amount lower than what you should have paid, so do you mean that you paid back less than the amount of deposit you received?  
If that's the case, you haven't incurred a loss. 
Thank you.