Disgusting service

I am writing to you with so much disgust as to why would rain do this to us. I bought a router for my fiancé and his meant to pay R625 monthly however his been charged R910 monthly and when he asked he was told his been charged for sim cards as well. Why should he be charged for sim cards when it is said the router comes with sim cards? I bought this router and I also received 2sim cards and I am not charged for that. Upon purchase I had to pay 130 if I am not mistaken then pay another R100 and something then then R1 rand 😳😳😳I need an explanation to all of this and I need a refund or else cancel this and come collect your router