facetime calls wrong person

I have been using facetime extensively for a few years, and talk with my boyfriend living abroad on a daily basis. This has worked very well for years now, but since two weeks back, my call somehow goes to another person? This is obviously very frustrating for me, my boyfriend and the other person... I have browsed similar questions in the community but cannot find any replies on how to fix these problems.

Please help me

kind regards

kaia