The questionnaire is not a judgment on your work. Your customer is under obligations of their own, and those obligations reach every supplier they keep. They sent the form because they intend to keep working with you.
The paperwork is still written for companies ten times your size. The IT provider who keeps the computers running is rarely the person who can answer it, and the firms that can usually want to take over the whole network first.
We do the technical work and the paperwork, for businesses from ten to seventy-five people across Orange County and the LA basin. We do not need to replace whoever you already use.