Could I please get some advice please? I recently had to buy my first wheelchair and used a well known chain of mobility specialists as I needed advice on which one to buy. Upon using it we found it had no way of being slowed down on slopes, etc. When I re-read the user manual I realised that I had a chair with wheel locks for use when stationary NOT wheel brakes. My partner can not hold my weight going down a slope, so this is not fit for purpose. I went back to the shop where they waffled on and said they would ring me and a week later I have heard nothing. Where do I go from here? Stupidly I paid with my debit card not credit card. Advice would appreciated.