I finally got Sunday Ticket to go but had to jump through hoops to do so. Years ago they had a special where if you bought a special anniversary Madden game you got Sunday ticket free for a season. i did that and got the season free using my email. 2 years ago while living in Sacramento we had to get Directv. I tried to add Sunday ticket and had a nightmare because "your email is already used for an account." I got so fed up I gave up and just watched on Reddit links all year with mixed results.
So two nights ago I tried to sign up again and surprise, your email already exists with an account. So I tried activate said account, I changed my password 3 times and yet when I'd try to login again, wouldn't work. Called them 20 minutes later the person said they did not understand why it would not let me activate the old account but thought it was because I was just getting Sunday ticket not directv. He finally told me my best advice is use another email like your work email. didn't want to use work so I created a 2nd gmail account. He then gave me a 25% discount for the trouble so instead of 4 monthly payments I only had to pay 3. Still too expensive but I want to see what we look like and this year is particularly bad for televised games in the bay area. Near as I can tell only our 2 games with the 49ers will be on tv so the other 14 would require links if not for Sunday ticket.
To be fair, I had a similar issue when setting up my Xfinity tv app on my smart tv. It could not handle that my service had been disconnected and reconnected a year later it had the same that email already exists issue. they were eventually able to resolve it, Directv has now twice failed to do so but at least the guy made a good suggestion about using another email.