Makro online platform another ****my affair

I ordered charger online which is stated to be universal as advertised, after lots of delays and back and forth, they collected their product unfit for my use. After collection of your unfit charger is over 2weeks I requested them when are you going to refund my money. There has been not any reply apart from automatic generated replies. This makro online platform is this yet another of those **** business out there

Can you advise???