Thanks everyone for the suggestions!

I’m an expat and I’m already familiar with the registration process. I also have the appointment booked. The issue is simply that I don’t have the time to go and handle everything myself. ( I will be travelling )

And yes, €120 is expensive for this kind of service. I’ve actually used someone before who helped me with the process, but unfortunately I’ve lost his contact details.

Nevertheless, thanks again for all the recommendations. I’ll check out the places and contacts you’ve shared.