Someone hacked into my account and spent all my psn wallet money, what are my options?

Somehow someone logged into my main psn account and bought Destiny 2 Pre Order and Killing Floor 2, spending nearly all of my £95 that I had saved up to buy seasonal lootboxes for the year.

I contacted the UK twitter and they responded, giving me a dead link and then later telling me to email help, I got the phone number too but that going to be a bit expensive to call since im not in the UK right now.

Anything else I can do to get my money back? Thanks