Sometimes the best revenge is by acting like it doesn't bother you. What is their goal? To hurt you (mentally) and see if they can get you to leave or mess up or whatever. It is going to be very tough, but don't let them chase you away. Ignore them when they are saying stuff during practice. Show your coaches what a good worker you are. You will make them confused when you don't sink to their level. It will be incredibly difficult (believe me, I have been there) but you can do it. It might get worse for a while, but eventually they will give up and ignore you. Find someone who you can vent to and keep your chin up and your shoulders back. They won't understand why you are letting it all roll off your back.
In my opinion, your mom does need to go back and have another meeting with the owner, the head coach, and your team coaches because this is not acceptable. I know the owners of the gym we attend would not put up with it. Let us know how it goes.
