Is the Wheel Assy. (ON30 Gas Mechanical) still available?

Any one know of a sound decoder for the Porter as an add on?

I recently sent in an engine for service.  I purchased the engine on 10/8/2015 from my local hobby shop.  Did not test run the engine before buying - my mistake.  When I finally got around to trying it out on 10/10 and it didn't run very good or for very long (12 feet total).

After reading the requirements to service an engine I looked for my receipt which I couldn't find so I went back to my hobby shop with the engine and got a duplicate receipt.

Submitted a service request on 10/23 and once I had the return authorization I packed the purchase receipt under the return authorization inside the engine box and mailed the package on 10/24.

On 10/30 I received a call from the service department that the engine was not repairable and to replace it was going to cost me $55.  I stated that the purchase receipt was packed with the engine and the response was that there was no receipt.

Arguing didn't help so I paid for the replacement engine. 

What do I need to do to get a refund on an engine that I have had for less than a month?

Can provide RO NO on request.

Dan Boucher