You might try the Prusa forums.
I forgot to ask, is this a new printer or a printer you've been using for a while and just started having problems?
If it's a well-used printer, it is possible that the PTFE tube in the extruder is damaged (it can get "cooked" eventually, resulting in uneven extrusion or jamming). It's pretty straightforward to check: https://help.prusa3d.com/en/guide/how-to-replace-a-ptfe-tube-mk3s-mk2-5s-mmu2s_21664/
I have found the help technicians at info -at- prusa3d.com to be responsive even though they may not be able to solve the problem.