Welcome to Vodafone Community
I've been having this problem for the past couple weeks, and it's that I can't seem to buy anything of any value at all from google play via vodafone billing, it just tells me that the purchase was unsuccessful. It would be really cool if someone could help me out with this, thank you in advance!
It's me again, I've finally figured out what the problem is. This has persisted for over two weeks, and has caused me a lot of inconvenience. Whenever I try and pay for something by this method, even if it's under a pound in value, it didn't work but didn't tell me why, now it's evident that I've apparently gone over the spending limit for September, which isn't possible, as Vodafone wasn't letting me pay for anything this entire month. It would be really nice if someone could help me out here!