Danish users: Getting Mobilepay app to work?

Hi Are there any Danish users here who have managed to make the mobilepay app (from mobilepay.dk) work? And if so, what steps did you take? It is Sailfish OS 3 on a Sony Xperia XA2. I have tried to install Google Play Store and Google Play Services, but Google Play Store crashes and so I installed the mobilepay app with the apk installation method, but when I start mobilepay it stops with a message that it needs Google Services to run. So I am stuck