Very disappointed in HOMECHOICE

I bought a heater last year March, i only started using it this year a month ago. I followed the instructions but still struggle to switch it on, most of the time i give up and have to sleep in the cold.i reported it but they want me to take in myself, i don't have the means to and i anyway paid more than double with delivery charges etc, It is also still under guarantee buti have to disassemble it and either post it or take it in myself. Cash price was R1499 last year, total was R1800, my sister paid 850 cash somewhere else this year, i was shocked. I would appreciate it if HOMECHOICE can do the decent thing and test it at my place, fix it or i would rather like to replace it, i have sent several emails but no reply, i very disappointed. My invoice nr ***2 acc ***3