Winnie customer service

Today I phoned in to make some changes on my policy. As its weekend, i was helped in no time by Winnie at customer service. My airtime was very low and I informed her about it,she never offered to call me back,but instead,she just kept on singing the t's and c's about the call, which took forever,and there goes my airtime,eish, after about 10seconds she called back and said she's doing me a favor by calling me back, I was not impressed by what she was saying,she works in customer service and it seems their job is to decide who they gonna do a favor for today, Long story short, I was highly impressed with her service,well done Winnie for getting back to me, you should tell your superiours to make it policy to call clients back and not a favour