Automated tool that can fill 20k forms with dynamic field and bypass very basic captcha

I need to fill the name, email, subject, and message fields of a 20k forms that are 90% similar. I have a csv of 20k URLs, and this is an example of one of the pages: [login to view URL] Here's a screenshot of what needs to be filled and the dynamic field: [login to view URL] Subject and message must be customized a bit to include part of the domain. For example, the subject line would be: "Custom, Branded Packaging for {{Ricksretro}}" with Riskretro changing dynamically based on what's in front of bigcartel. In addition, the message field would have Ricksretro mentioned twice as well. All domains on the bigcartel site have that similar [login to view URL] style domain, XYZ interchanging. Since it's 20k people, I want to A/B test this with three other messages. Thus, I will test 3 different slightly different messages for 1k sites each, then do the rest of the 17k with the best message. Thus, I need 3 total tools.