There are many ways.
Cut and clears, Hot Foot banishings, Freezer spells (including Vovin’s famous one, which Lady Eva referenced here awhile back), Break Up spells (it’s 100% valid to use a break up spell on yourself and someone you don’t want), etc. Use Search bar, there’s a lot of good stuff on here.
Adding a Protection ritual to keep them away can help stop them from weaselling their way back in.