Forced to buy a device I do not want

I app**** for a cellphone contract online that is R399.00, for a phone brand that I use, and prefer, I qualified and was told I will receive a call to finalize my contract. The consultant that call told me that I do not qualify, and I qualify for another device that I do want and will be R599, and that the contract I wanted was only for existing customers only, yet online there's an option for new customers to apply... So I just wanted to get better help, so that I can get what I want, I cannot be forced to buy something I do not want, just because they feel the need to get certain devices out ... Very displeased