My OXO Tot highchair broke!! The tray no longer stays on. It slides right off. Complete mess this morning and we can't deal with it anymore. Has this happened to anyone and has anyone gotten a replacement part? I can't find one. I bought it at buy buy baby. What is a cheap high chair alternative in case I have to fully buy a new one. I have a new baby coming up soon on needing one so I have to have a high chair. Ugh.