Vodocam delivery and extended contracts - confirmations of services not carried out!

I updgraded/estended my contract for my data bundle and received a package that included a Tablet. The new sim card was promised to be sent to me free of charge and no delivery . NO SIM CARD ARRIVED. I have now been told that I will be invoiced for this and when I receive the invoice, I can dispute it. What utter nonsense being promised one thing and then not receiving what was confirmed and me having to dispute things after. This is a waste of time and bad service. I am not happy about this at all