Help: Can't reach support

I had myself DNK tested, thought it will cost me 30€, but it billed me for 120€ and bought the annual subscription. I can't cancel the subscription in anyway, because I cant reach support. For me to reach support, I would need to login on website, but unfortunately I used Apple login, which for some reason doesn't work on the browser. I can normally login into app on phone, but can't login on the computer/phone browser, therefore can't contact support.

I believe I have tried everything and don't know what else to do...

Please help.