Sorry you've had that hassle - it is frustrating. My impressions of the suppliers I'm tending to use at the moment is that the vast majority offer really good, friendly, service. One person stands out so I'll name him; that's John Williams from CareClean UK. But also Ian Banks at Clean Machine, Brian & John at Extracta and John at Restormate.
I personally got put off two companies very early on - that was Ashbys and Alltec as their marketing machine is just nauseatingly aggresive and that's a big turn off for a lot of people.
I sometimes get multiple junk emails per day from Robert Saunders, and as for Ashbys, I think I'm on to my 4th brochure in as many weeks...... it's just too much. Ashbys really knarked me because they had a recon Ninja in that I was v. interested in. I sent an email asking a simple quesion and was about to buy it but heard nothing back and got side-tracked. Anyway,
11 days later Martin Ashby emailed me to say "sorry it's gone. however I have enclosed a
special offer on a brand new ninja". (It was the same 'special offer' they send out with every brochure but with my name 'customized' on the attached document

On the whole though, I've found there to be some pretty decent suppliers out there.
