Welcome to Vodafone Community
I've been going over my 5gb data limit recently on my 30 day contract, so went to see if I could change my plan. To my delight Vodafone are offering a 20gb 30 day plan for only £2 more than I'm currently paying. That was of course before I logged into my account.
For a split second you can see them, then the page reloads with the user info and all trace of the 30 day plans are hidden (video link). I was no longer offered the plan I needed. Forced to continue to pay fees for my over usage (£6.50 per 250mb) or pay an extra £10 a month on top of my current £20 to get an extra 2gb a month.
I've had a phone contract with Vodafone for over 10 years, today was the first time I've considered leaving.
If this had been my situation @SuperKingPrawn I would have voted to call 191 or use Live Chat or if local to me pop into a Vodafone Highstreet Store as all 3 options can help you with your account and current monthly tariff options.
Your own myvodafone should provide you with tailored info relating to your account and Yes I agree should show you what's on offer.
I wish you all the best with this situation.
Current Phone > Samsung Note 10+ 5G _256Gb > Model: SM-N976B.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.
You are probably on one of the older 30 day SIM only contracts, give Vodafone a call and ask them to change your tariff to the newer 30 day SIM you have seen online.
If you agree a 12 month contract, with the commitment being longer and as you have been a customer for some time, you should get a good deal.