Transfer from PAYG to contract gone wrong?

I'm a Vodafone customer and I recently bought an iPhone 5S on Pay Monthly. I'm transferring my number from my old Xperia which is on Vodafone PAYG. Since about an hour or two ago, my Xperia is now showing the message: SIM not provisoned MM #2. My iPhone on the other hand, shows a signal but when I dial my old number on the landline (assuming the number has been transferred to my iPhone), the landline says my number is not recongised. I find this very confusing because my iPhone shows a signal (no matter how many times I reboot it). However when I go to Settings > Phone, my iPhone shows the temporary number that came with my nano SIM. Has something gone wrong?

Added (1). I'm transferring from Vodafone PAYG to Vodafone Pay Monthly, not from another carrier. And the support page never said anything about turning either of the phones off. It said that when the old SIM loses service, insert the new SIM to the phone, and the old number should be on the phone. Unfortunately this is not the case… Soz I'm being a bit impatient xD

Can take up to 72 hours for the number to be ported to your new carrier. The carrier that you had the number ported to, should have told you to leave the old phone OFF during this period or at least on airplane mode, and given you a temp number with your new phone.

Not gone wrong, you just were not given or didn't pay attention to all the information.

Wait for a week, it take that much time, depending on different area. For safe and secure use of your smart phone, you also need Leo Privacy Guard app, Just a click to lock all apps.