Incorrect delivery issues

I ordered a device through FNB online beautiful experience until the wrong device was delivered to me on Monday 5th of February 2018. Since then I have made more than 15 calls and have been asked for emails with pictures and still nothing. I keep getting the same responses from the device center that there is no feedback and they will escalate. 3 days later and I am still stuck with an incorrect device that is not even insured no ETA on replacement still. As a happy FNB customer until now this is really disappointing and pathetic service.