The thing is that I bought it from Snowys in Adelaide and I live in Sydney. I rang Thetford to see what can be done. They said just take it to any authorised dealer and they will handle the warranty claim. They suggested BCF or Ray's Outdoors. Incidentally, BCF, Ray’s Outdoors, Supercheap Auto and Rebel Sport are all owned by the same company. So I went to the nearest BCF being BCF Belrose. I had the part and the documentation. They couldn't understand why I brought it to them since I didn't buy it there. After some head scratching they rang the boss. The boss suggested I leave the matter with them, they would ring Thetford and let me know the following Monday. Two weeks later, no phone call. If that's what they call service, I won't be walking through the doors of Buy Crap From Belrose any time soon.
So I rang Kangaroo Tent City Chatswood. They said that while they are authorised dealers, their particular shop no longer carries Porta Potti but to bring it in anyway and they will see what they can do. I brought in the porta potti with all the paper work. They wanted only the paper work and my details. I had a bow peek around their shop and by the time I had finished they had faxed off the warranty claim to Thetford. Now that is service! Kangaroo Tent City Chatswood is now my "go to" camping shop regardless of the price. Now I hope Thetford come good. It seems they regard it as unfixable and will simply replace the bottom section.
Ive had the same thing with BCF and Rays.
BCF, went in to look for some handhelds that they had in stock at another store but not my local, manager was to ring me when they turned up waiting 3 weeks for a call i ended up going in and only to find they never rang me, got them in and sold them 2 days prior to me turning up. Apparently they said they wont call.
Rays, had a problem with a staff member and her attitude, she treated us like *$^@ and my wife just walked out saying you can shove it, i had enough and rang head office got onto a nice guy on the phone who chucked some credit onto my account and put in a complaint order for this worker, last i seen she was not working there anymore.
I now shop around at the other 3 local camping shops usually i can get better service and a few extras chucked in if im nice (which i am always).
Hopefully your toilet is fixed under warranty, mine had the bellows break on it and i cannot for the life of me work out how to replace it.