Failure to deliver what is advertised

Found a deal For Samsung and Watch online. Went through the full process authentication, personal details, Delivery address and banking information and submission. Get a call from a sales agent and go through the same process.

To be told the deal does not exist even though the sales agent sees the deal on the website. That the deal is an error made by the marketing team. When asked to speak to a supervisor the person puts me through to customer care that end up being Mobibot. If the deal is an error why has it not been removed?