Appalling customer service

Within a short time the trigger leaked while under guarantee. Told replacements were out of stock! After many fruitless emails I had to take out a Small Court Claim (£25.00) This spurred them into action and finally was sent a second hand replacement!
I still await a new replacement.
As they couldn't honour their guarantee I asked for either a refund or a new product. I was told that as I hadn't bought it directly from them they couldn't refund despite providing proof of purchase. There was no offer of a replacement!
Also no offer of refunding the £25.00 for proceeding with legal action.
Caveat Emptor