Infuriated due to incompetence on YOUR side

I am annoyed to say the least.

A technical problem was logged by the very helpful staff at the Vodacom shop in Bedford centre on 18 January 2018. This was due to your system not allowing my upgrade to be processed, even though I am rightfully due to upgrade.

After some investigation it appears that the person who convinced me to take out the contract in 2016 didn't do their job properly. My agreement was not put on the system (big legal issue) and yet you are quite happy to be taking my money every month!

I have paid every month for the (?*******?) contract and you are withholding my upgrade because of YOUR oversight!

What is it going to take for you to sort it out?

Why is it necessary for me to have to post on social media in the hopes that SOMEONE will do their job?!?!

You are so quick to enforce your terms and conditions when it suits you, but you can't be bothered to help a client who has been a loyal customer for 8 years!

I expect a response as a matter of urgency.