How can I fix it

I have a little experience with this program if you would like to chat about it hit me up. Just let me know more about your problem other than it keeps falling off.

Oh yeah, sorry. The push in the joint that holds the filament guide in place that came with the XYZ da Vinci Jr. was defective. I am pretty sure that the teeth inside of the push in joint are not holding the filament guide tube in place. I have bought many replacement parts for this piece but none of them seem to fit. And every time I put in the correct measurements it says that that piece does not exist. So I found out you cannot fix the problem but you have to get a new piece. If you could possibly help me find the replacement part of the piece that would mean a lot to me. And if you still are interested in helping me then call the number 855–999–3348 for technical support for XYZ 3D printing. For more information about my 3-D printer simply text the number 385 290-8987 (my number)

sorry for such a long reply.