It's most annoying that when you complain, the t-mobile staff suggest using the marketing preferences, to avoid these surveys, ignoring the fact that all the people complaining already had set everything to "Opt-Out". I wonder if someone senior in the Marketing department is short-selling their t-mobile stock, and sabotaging the company deliberately, so they can make a fraudulent profit. There doesn't seem any other rational explanation for why you would deliberately ignore your customer's do-not-contact requests, for a 'satisfaction survey'.
Unfortunately it's because you basically signed off on it when you signed up with Tmobile.
16. * Notices and Customer Communications.
You expressly consent to be contacted, for any and all purposes, at any telephone number, or physical or electronic address you provide to us or that we provide to you. You agree that T-Mobile may contact you in any way, including, pre-recorded or artificial voice or text messages delivered by an automatic telephone dialing system, or e-mail messages delivered by an automatic e-mailing system. Notices from us to you are considered delivered when we send them to your Device or by email or fax to any email or fax number you provided to us, or 3 days after mailing to your billing address. For multi-line accounts, a "Primary Telephone Number" may be assigned to your account for the purpose of receiving notices from us, as well as for other purposes. If you would like to designate a Primary Telephone Number, please contact T-Mobile.