Hi @ibsanb123 thanks a lot for your reply.
Yes, the contract disconnection fees would've applied by the sounds of it but only very minimal as you were only 4 days before this.
However, if you've extended the installation date on our side, but not spoken to Talk Talk to inform them of us this then you might find your services terminate on the 14th with them, and be left 4 days without service altogether.
It's unclear from your message if you've informed TT of your new date with us, but if not I'd advise informing them and they can ensure there's no hiccups here.
If there's been a number port requested, the landline number will be held from your provider until we take this over. This can sometimes mean (in very rare circumstances) that if there's any issues installing services on our side, you might be charged from TT for a landline only service solely to keep the number active until we take this over.
Always here if you need further help so please don't hesitate to ask if you have any further queries.