That is not a nice way for people to treat you. It must be so frustrating and it is disrespectful towards you.

Something like this used to happen to me but then this person stopped being part of my life and so the problem sort of solved itself. I never really found a good solution to the problem and it really drove me crazy.

I did an internet search "how to stop people from interrupting you" and found some good advice there. Don't know if it would work for you. Sure hope you find a solution. You deserve to be heard without interruption. That is common courtesy. I hope you will not let this affect your self-esteem since you are the victim here.

So sorry I don't know how to be helpful to you.