I have the EXACT same issue, going on since 9th July! I passed the credit check also. Then my order got 'stuck' due to a Three technical issue, so I had to wait 72 hours for the IT team to resolve. They did this and told me I would receive E Sign documents. I never received them, despite a 1 hour telephone call where they sent me a copy of the document to sign and send back to the email address. I did this, but still heard nothing. I was then told I needed to go through ANOTHER credit check, which I again passed. I was told everything was fine and they would contact me again in ANOTHER 72 hours. Then Three cancelled my entire order, and I was simply told to apply again. I went instore to be told my order was still stuck and I needed to call to go through the entire process again. I had ANOTHER credit check and because of the numerous checks before, this time it was referred to their credit checking department. I was then told to send them bank statements via email. This is absolutely crazy. On Saturday 13th July, I emailed the credit checking department and the board members of Three, and have had absolutely ZERO response. I'm supposed to be a loyal customer for the past 6 years. I simply cant believe the way I've been treated. Really terrible service. Three are supposed to be keeping me as a Customer. My credit score is now ruined thanks to this.
