Suggestion ---- stop putting your switch requests in writing by e-mail, because that is much more likely to eliminate the possibility of switching. Stick to phone only. Call, ask to switch to the Mega promo you want, and if you get it, great. If you don't get it, hang up and call back, and hope you get someone else, who will look upon your request in a more kindly manner. By sending e-mail, you will formally memorialize your request (and the denial) in writing, and changing will likely never happen. While I am not saying that calling a second, or even a third, time is a sure thing, IMO it is likely to have a higher chance of success than e-mailing. Good luck, and as always, YMMV!