Gotcha. Apologize for the misunderstanding in my post You said "replacement parts" so figured you were asking about the new arm joints. Didn't mean to ruffle any feathers
In normal circumstances, I hear back in about 1-2days when submitting a return/exchange request. Did you get the auto-email saying they received your request after you submitted the form? If not, I'd wager your request didn't go through and you may want to try a different browser. I tried submitting a request through my phone once and it wouldn't go through. If you did get the auto-response, then I would try giving them a call if you can.