Texting issues after transferring to xfinity mobile

After switching from mint to xfinity I'm having some strange stuff happen with my messages.

One problem is my phone keeps creating group chats for conversations I'm already in.

Example: I'm texting my friend and they get back to me a bit later, my messages will creat a group chat of me and them with just the friends response.

Another issue I'm having is not being able to send messages as my phone will fail to send repeatedly unless I power off and on OR switch to airplane mode and back.

I'll be messaging people fine then it will just stop sending my messages through.

I'm also having issues with my home wifi on just my phone and only at home, my wifi will drop every minute and won't stay connected for more then a few minutes at a time or connect but say I have no wifi.

I am the only device in my household that has this issue.