EE keep sending me emails intended for someone else

[FedUpCustomer26]

I've been getting multiple emails for someone who is having broadband installed. It's not my address on the order, however, it is my account number from when I used to have a mobile phone with them. I've tried during multiple calls to customer services to get this sorted, but everytime I'm told "It's nothing to worry about" or "Just ignore them" despite the fact this is EXACTLTY the way identity theft starts. Also, on a secondary level, the GDPR infractions they are causing are immense. I have the name, address and now, thanks to having the Royal Mail tracking number for the hub, the SIGNATURE of a complete stranger. Imagine if I were a thief. What a boon this would be. So EE - are you going to sort this for me? Or just keep pretending to or telling me "not to worry"? 
Your hand may be forced soon anyway as becuase I had the address, I wrote to the people who you keep breaking GDPR law around to ensure you had written to them to inform them of the breach of their data, like I reminded you over the phone in one of my many calls with you that you had a legal duty to do so. I'm sure if you have then they won't be surprised to get a letter from someone who knows their details and even what time they signed for their hub at reminding them they have legal rights over the protection of their data, and outlining how they can take action against you for breaching them.

[FedUpCustomer26]

Yep. I've been trying to get them to stop sending me emails for a total stranger and confirm it's not an attempt at ID theft for around six weeks now. Either the fourth or the fith agent about to deal with it. All of them have failed so far - every single one with the distinct tone on the phone that it's my fault, or I'm causing a stink over nothing. The last guy even told me "It's an incredible simple problem to solve" and then failed to solve it.
I'm not even an EE customer. That's how bad their customer service is.

[FedUpCustomer26]

GUESS WHAT EVERYONE? Literally nothing has happened. Still getting strangers' emails, now asking me to rate my service. Guess what rating I put?
Was promised, after my fourth complaint, to be sent a £30 good will payment. 

NEVER HAPPENED! Complained about this not happening. Have discovered ABSOLUTLEY NO RECORD OF ANY FOUR PREVIOUS CONVERSATIONS has been kept. 
Now being promised another £30 goodwill payment to "resolve this in full."

That's not on top of the first one. So, FIFTH complaint complete and literally no further on.

Worst customer service of any company ever. Worse even than BT. Oh. Hang on, there's a pattern developing here. 

PS - Was also told they are "unable to contact Openreach" to remove my email from their system, so I'm continuing to get emails from Openreach. Weird, cause I didn't give my email to Openreach, so I'm guessing EE CAN actually contact Openreach, but are chosing to refuse to do so in this case. Openreach say they cannot deal with me as I am not the account holder, so I'm stuck getting strangers emails yet again. 

Don't ever use EE ever.