Terrible customer service

I have the twisp Aero. It was working fine for the first few months. After awhile the battery start giving me issues. I visited the shop in Northgate and they said they will contact their head office and replace the battery. I decided to buy a new battery to use as a spare. a week later the new battery stopped working as well. I went back to Northgate and complained about battery, they said they will be happy to swop out the battery but they don't have stock but they contact me as soon as they receive their stock. It's been 4 months now and they still not able to sort out the batteries. This is unacceptable, they were very willing to take my money but not in helping me. I've contact the head office in Cape town and they promise that someone will contact me and arrange delivery to my house....but I've not heard anything from them.<br> <br> Please can someone contact me and explain what is happening.