Poor service VODACOM

On Monday the 9th of July 2018 at 15.30 pm I took my Daughter to bought a battery for her Cellphone because she need one very urgent at Vodacom shop Vaalmall Vanderbijlpark. The Manager promise me that is not the original Samsung battery but he can promise me I not have a problem. We put the battery on charge immediately and in 3 minutes it shows 100% charge. When my Daughter put it in her phone and switch it on the battery go down to 40% . We not even have the battery 8 hours but they don't want to refund or replace the battery. Now why must she wait another week for her refund as she need a battery urgent. Very poor service and the people who work there don't know what is customer service.