Vodacom NEWMARKET MALL useless

I purchased 3 Vodacom Kika VE cellular phones during March 2020. The sales person and the cover of the box stated that after one year you can open the network lock on the cellular phones. On the 2nd and the 3rd September 2021 I called 135 to open network lock on the phones. She directed me to a Vodacom store. I went to New market Mall, Alberton, Johannesburg South Vodacom and the Tec gave me five different stories. The repairs manager was on a smoke break and 45 minutes later the Repairs Manager, DARREN GOLIATH told me he doesn't know what to do. He will call me on the 6th September at 14:30. DARREN GOLIATH never called. Vodacom, train your employees on your products and unlock my phones asap.