Automated individualised email after every form submission (a little more than Typeform offers)

I’m looking for a platform that will allow me to customise an email off the back of every form submission. I know Typeform can do it with their ‘Notification’ solution, but I need to add a small jpg banner to the top of the mail. I’ve tried Zapier to Gmail but many companies block images that are downloaded off of the interwebs. I’ve tried MailChimp, however MailChimp only seems to recognise new additions to the list, so a second response from someone is ignored. My list is long and frustrating that I am unable to describe to Google (I haven’t tried Chat GPT). 

I am hoping there’s a human out there who has been through my pain and will share some of their hard earned experience and wisdom

Thanks