I tried to do this manually on my phone, but no chance. The contacts randomly split or merge, then another telegram account pops up, the next contact is protected and therefore cannot be removed but only be hidden. Some contacts are not on DEVICE, so messaging apps cannot access them etc.
If you find a solution to sanitize vcfs let me know. I guess one day I write all the numbers onto a piece of paper and start from scratch.
Btw. I’m not sure if this community is the best place for this.