Thanks for reaching out to the Community! With surveys it's not always a matter of how many questions, but how much time is needed to complete. You will find you get a better response if you let your contacts know how long they need to set aside (e.g. 3 min., 8 min., 25 minutes) Please see the article below for additional tips.
Tips for Ideal Survey Length
Short and focused surveys with specific objectives get the best response rates
Surveys create two-way dialogue between you and your customers. They can provide the insights needed to retain existing customers and attract new ones. For a better response and completion rate, your survey should take no longer than 5 minutes to complete. Typically, surveys with 10 or fewer questions fit this guideline.
Consider these tips when creating your next survey: