Poor customer service from home cloud solutions

I ordered a mini mifi pocket router , I got approved I was told that I will pay 373 for it, and it will be delivered in 72 hours , one day later I was told that they were out of stock my order will be dispatched on the 12/10/2018 , on Thursday last week a delivery was made to me when I open it , it was a modern with a Telkom sim card , something I never ordered I called the Lady who did my application she told me she was on sick leave I must call the office , I called and I was transfered to a guy who said he will call me back on Thursday but never did, I receive an email from home cloud to say I will pay 606 instead of 373 I contacted the sales lady she was on sick leave again and she was very rude and unprofessional , I sent 2 emails to home cloud no response on Friday I called again same thing they will call me back no one ever called for the whole day . today Monday I sent a WhatsApp message to the lady who is my sales consultant , I got a call and I was transfered from one person to another but nobody assisted they all asked how can thy help me. I was told to send an email and management will call me up to now nobody has called , I will not pay 606 rand for a modern that I haven't ordered