Has been calling me about some money

Been spamming me since yesterday

Not sure what it was about but it's sure as hell annoying

+49 1515 1709731

You can block the phonenumber.

If they call you on your cell phone you can block them using the Truecaller app or you can follow these tutorials:

iOS:Block phone numbers, contacts, and emails on your iPhone, iPad, or iPod touch - Apple Support

Android:Block or unblock a phone number - Phone app Help