Should i contact them?

My sis is telling other family members something abt me that is making them hate me...Recently my sis started messaging my aunts and cousins a lot...and they apparently have a close relationship now...recently i have learnt that she told them that im not speaking to them.

My sis hates me for some reason I don't know.. She never invites me to family gatherings... N when I ask if everything's OK she makes excuses such as she didn't know they were going to visit FAM till last min etc.... I have mentioned this in a pleasant non confrontational manner before... N she denied that she knew what I was talking abt. Yet she continued to act weird...

My uncle who lives closeby asked me when was the last time I spoke to my aunt, uncles etc (they live a distance away).. I told him abt two months ago... He replied that he will call them one day n he will let me chat w them. So I guess my uncle realksed that ppl are trying to mess me up, n he knows I'm a good person n is trying to make ppl see that