quick help required re collection address

[curtainfringe]

I won and paid for an item for collection only due to its size. The only communication I have had from the seller is a brief message giving me quite a narrow collection time window (tomorrow morning!) but no address or other contact details. Sent them a message last night asking for a collection address but have had no reply as yet.

When I have bought things for collection previously they have given me an address.

Is there somewhere on ebay I am supposed to find their address or does the seller have to give me this information?