What do I do if my ex keeps contacting me?

Ignore it. Don't get yourself in that situation, and is she/he keeps on contacting you, then block them.

If you are comfortable in talking to him/her , then go ahead answer his/her call. But if you are not then politely ask them to contact you again .

If your ex keeps on contacting you and it makes you feel uncomfortable or doesn't do you any good (i.e. in terms of moving on, for example,) then you can be honest with him and tell him that you don't want to talk anymore and would want to have some time alone. Just make sure that you don't sound rude, but be honest with him as well. Tell him why you don't want him to contact you anymore. After that, you can wait for his response. If he still contacts you, and if you are really bothered by it, then maybe you can block him.

block him or just talk to him about that, you won't feel better until that happend

ignore Possibly politely, this is a very unfriendly way. But it should be cut off early, there is no need to continue contact. For ex-boyfriends/girlfriends, many of us can't bear our hearts, and always have an illusion about our ex. In fact, the best way for us is to give up. Another is to be a normal friend This may be the best practice for some people. It is not impossible for an ex to become an ordinary friend. Just imagine, if your ex-boyfriend/girlfriend took the initiative to contact you, there must be something special. If there is nothing, people will not come to you. Be a good friend, help when you are in trouble, and chat when you have something.

Block the ex, if they are making different accounts to try and contact you, ask them nicely to stop contacting you, because you need some closure, some time apart from them. Explain that to them in the nicest possible way at first, but if they get angry about that, be firm.

Explain him that it is not comfortable for you. Even if he doesn't understand then block his number and if her gets too aggressive please report him to police as it will eventually get worse as you will start enabling him.

Tell them that you don't want them to do it. If they don't listen, block them from social medias. If you don't feel comfortable talking to them yourself, get a friend to let them know that you don't want them to contact you. In extreme cases, like harassment, the police is the best option.

If it bothers you, then you should tell them clearly that you don't want them contacting you. If they continue, then it's better if you change your number or block them from social media and stuff like this that will prevent them from contacting you again.

It depends if you want him/her to contact you or not. If not, politely explain to your ex your situation, or simply block them/delete them from your contacts.