My store currency changed from EUR to HKD

I visited Hong Kong a couple of months ago, I only used my smartphone to log into WT Mobile and never bought anything there. Now on my PC back in the EU where I live all store prices are in HK Dollars, how do I revert back to my home currency EUR in which I always buy things?

If logging into wt mobile changed it once, try it again i guess🤷🏻‍♂️

I log into WT Mobile daily here back in the EU, it changes nothing.