Vodacom is selling defective products and they don’t take their customers complaints serious

I am not happy with vodacom Rustenburg mall as well as vodacom complaint department I bought a charger from them and the charger never lasted for a month upon returning a charger for an exchange the manager refused to exchange and insisted that I buy a new charger in a very rude manner ,I sent a complaint to vodacom yet no one assisted till today I even reported to hellopeter still I didn’t get any help from vodacom