Why doesn't AWS fix IP address listed as a SPAM source used by SES?

I am trying to use SES to send our company's transactional emails, but the IP address AWS use to send them (27.50.64.177) has been listed on UCEPROTECTL3 as a spam source. As it is a shared IP, I have no control over who uses it, and obviously AWS are allowing someone to use it to send spam, so then I have to suffer! I tried to tell AWS support about the issue, but apparently the tens of thousands of dollars I spend every year as an AWS partner are not enough, I need to sign up for a support contract as well for them to fix a problem with THEIR service.

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