Pathetic service from RCS-Game store card

I have requested a cash back facility on my Game store card on Saturday (14/09/2019) I waited on the line for approximately 30 minutes and concluded with all my correct details given to the agent to process transaction and they advised me to wait 48 hours, today the 18/09/2019 I called in to query why the funds are not reflecting,I am currently on the call centre with them for an hour with no joy, the agent had put the incorrect details now they are just putting from 1 agent to the next with no assistance, agent by the name of Elanor is rude and not willing to assist,she just remained silent on the phone and transferred me once again. Please assist.