PAYG SIM inactive, reactivated, previous balance disappeared

[timeforacatnap]

TL;DR - my PAYG SIM deactivated due to limited usage, I'm abroad, but travel back to the UK annual and try to keep this SIM live. I called to reactivate, but my previous balance, which was substantial has disappeared (it says 'closing adjustment' and -£xxx, the amount i had in credit) - ** How can i get this amount back?**

i tried to call, but i was on hold for so long, my local sim card here in asia ran out of credit whilst i was on hold. I'm so frustrated.

[timeforacatnap]

Thats the issue... it says its been reactivated, but the balance was not reinstated, which is why I'm trying to find some response/ contact here, given i'm abroad and waiting 30min-1hour on the customer helpline isn't ideal

[XRaySpeX]

All you can do is call CS. We can't have assess to your specific a/c.