Most people spend hours on the 7-day follow-up and about 30 seconds on the first message. That's backwards. If the first text doesn't get a reply, the rest of the sequence rarely gets a chance. What tends to work: mention what they actually asked about, keep it to two sentences, and ask one easy question they can answer in a word. Compare "Hi, thanks for contacting us" with "Hi Sam, saw you asked about a kitchen quote, are you hoping to start this month?" What's the first message you use, and what reply rate do you see?