My exes family are trying to come into my life a year after the break up. What can I do?

My exes family started contacting me a year after we broke up and trying to stay in touch now but I'm not interested. Why would they try so hard now to stay in touch when we weren't close to begin with? How can I push them away without blocking their text msgs? Like how dare they put me in this type of situation when my life was great leaving the past in the past!
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