Paypal give me the wrong return adress, no way to contact them to change it.

Description

So i have a claim open with paypal about a dj mixer i bought some time ago, now paypal needs me to return the mixer to the seller. However, the adress paypal gave me, is according to the seller, the wrong adress. I am very cautious so im not sending anything to another adress than paypal tells me. I am trying to contact paypal to update the adress, but its almost impossible to get in contact with them, there is also no way to respond the the last update of the claim, the only way to respond is through giving the tracking information. But im not doing that since i am not sending anything to the wrong adress. What should i do? i hope someone from paypal can make contact with me about this, i need to send out the package before september 11, but i dont want to send it the wrong one.