Can the health insurance company revoke an enforcement order?

Hello guys, I have a problem. I was registered as a freelancer or self-employed person for several months.

Although I wasn't actually there, I only worked as a freelance promoter for 5 days.

but then I forgot to unsubscribe.

Since my boss filled out everything for me (freelance form) and I am only 19 years old, I unfortunately did not know much about it

Then I contacted my health insurance company and they said I had to write a letter and explain how it was

I did that and then they told me that they would send me a form where I would have to go through the family insurance, through my mother, since I'm only 19.

then I wouldn't have to pay anything.

I thought there was still time so I went on holiday

Then when I was back in Germany

I received a letter from the main customs office and plus that I am no longer insured

1000 euros

Now my question is, if I explain to them that I was on vacation, could they theoretically lift the enforcement? Or is the main customs office now solely responsible, and it's too late?

I'll get a call back on Tuesday, but I won't be able to sleep peacefully until then. I can't pay for it and I'm also having orthodontic treatment, so I'd have to cancel everything because I'm not insured at the moment.

I am grateful for every helpful answer 🙂