A rant regarding Vodafone!

My 2 year deal was at a end on the 25th Dec 15 so i decided i would keep my old phone and downgrade my tariff to a sim only deal. Why keep paying extra to pay for a phone that i've already paid for. I choose the unlimited Minutes and Texts with 4Gb of 4g data, i calls the call centre on the 26th and was told sorry cant do it now your account is being moved to the new system please call back in a few days. Called back on the 31st agreed a plan listened to the T & C speech and off i goes. A few weeks have past and i checked the My Vodafone app to make sure i was on my new tariff and i wasn't. So i call the call centre on the Tues 12th Jan 16, normal stuff very sorry blah blah its all fine now your new plan will start at Midnight, Thanks. Checks app late on Wednesday, Guess what tariff not changed! Called call centre Thursday 14th while at work and gets an agent, ow i see yes my manager has allowed the change all will be good in no longer than 24Hrs . Friday 15th still no upgrade call them, sorry blah blah new system failure, all done have a couple of quid a month discount for your troubles. Saturday NO CHANGE now cant login to app or website, and there's a sudden Extra £20 charge on my account. I decide i will call on Sunday when i have plenty of time and im not so pissed off i might call them all a load of untrained monkeys and get charged with insulting monkeys, 30 mins on hold give up try later after lunch, 30 mins on hold gives up try later again, later 50 mins on hold i get someone who cant help next person cant help. On the 6th person now, all done will be working no longer than 24hrs well we will see about that soon enough. I ask to get to the web team to fix my access to the app and website he tries but cant help needs a member of the website team they don't work Sundays. So lets see that's 3hr 47mins about plus about an hour at work so about 5 hours so far to save £12 a month and get a bit more data. NEVER again, i think i am changing provider every year now just to keep them on there game. I have been a faithful Vodafone customer for 23 years this will be the last year for some time. That's assuming the tariff change does actually happen or it could be bye bye sooner VodaFone.