Sorry to hear of the incoming call issues you've been experiencing since transferring your number over to us, we appreciate you taking the time to raise this via the forums.
From looking at the account I can see you have spoken to the team since posting your query, were they able to resolve the issue for you?
If you still need assistance with this can you confirm if this is an issue with specific numbers or all? Is it in one location or everywhere you have tried? It sound cliché, but have you rebooted the handset since the transfer took place?