Game and RCS bad service

i went into the game store at southgate mall Johannesburg south, they gave me a phone to call the customer service call center to request a settlement amount. i paid the settlement amount in full right after i dropped the phone in store. they promised that they will close my account and send me a paid up letter but they keep on sending me a paid up letter for a Mr B Engelbrecht. i would like Game/ RCS to please send my paid up letter to my email address.