The integration of e-mail and sms mailing services at Landingi

we model infobiznesa, respectively we need a specialist for the integration of e-mail and SMS mailing services.
Task:
there are 3 Landinga – must be integrated so that there was the possibility to create automatic chain e-mails to our subscribers.
And so when "man on the 2nd landing page also bought a product" – he went one conversation with a closure on the 3rd landing, and when he bought for 3M – 2nd landing mailing it stopped and started 3rd etc