Your post was blank @AislingOS0545 and the subject line doesn't really explain the issue.
What exactly do you mean?
What exactly is going on?
Are you sure it's not scam callers spoofing your number when calling others?
This is very common
and there's little that anybody can do about this until/unless ComReg do something about it:
If you need to contact 48 support about this then see the links in my signature below.
