Grandparents forgetting birthdays

Anyway, fast forward.

I have 2 babies. (Oldest at almost 3 and youngest is 2) my grandparents hated that I got married so young (at 16) and always said "you could leave the baby with us!! Because your not gonna want to take care of it" they would talk mad smack. (Not once have they EVER stayed with them.) they tried to kiss my ass after my first baby because of things they did to me when I was younger. They came to my oldest Birthday party that I threw for her on her 1st birthday (her birthday is the day after Christmas) and for her secound birthday they didn't even acknowledge it. No calls, no card, no "Facebook" post. NOTHING. For my youngest, we celebrated her first birthday in New York while we were on vacation. They were sooo pissed that we did that and didn't talk to me for months, because they missed her 1st birthday 🙄 anyway, she turned 2 last month and they did the same thing that they did to my oldest to her. No acknowledgment what so ever. No call, no card. Nothing. I had put it all over Facebook about her birthday and Instagram (which my grandma has me on) and my grandma is on FB all day playing her games. The day before we went to their house and I said "I can't believe she's gonna be 2 tomorrow!" And my grandmother rolled her eyes and was like ""whatever"" 

The day after her birthday she had the decency to call me pissed saying "why didn't you tell me it was her birthday!" I didn't pick up because I was soo pissed for her. Their doing the same shit they did to me to them. My girls love them, but it's like they never come to see them and never acknowledge things when it counts. Their are their ONLY Great grandkids. My husbands grandparents don't do that and neither does my mom. It's only them. Like I shouldn't have to remind them of their only great grandkids birthdays. It's ridiculous. And it makes me so mad because they always try to pin it on me. It's not like their old and brittle and sick, their 55 and 60. My husbands grandparents are 80 for gods sake and his grandmother has dementia and she still remembers!! It just kills me. I would hate for them to love them so much and be crushed when they do stuff like that. It used to get me soo upset when they did it to me. I just don't know what to do. Every time I try to forget about it and let it go someone in my family mentions about how my grandma is mad at me🙄 I'm just soo over it. It also gets my mom sooo upset because she always said "they used to do the same thing to you" I just don't know anymore 😪 I want to move far AF with my hubby and girls and not ever contact them again. I just don't know what to do.

Please no negative comments. 

I would just like to know if anyone else has gone through this.