Did you tell them you offer other things? Clients often think you just do web design and are not aware of your other skills. This is an example of an email I send to my clients:
Subject: Follow up
Hi ____,
It is already 2 weeks since we pushed your website live. I just want to follow up and see if you have any questions or need any assistance. I really enjoyed working with you on this project, and I wanted to let you know that on top of web design and development, I also provide other services. So, if you need any assistance with the items listed below, feel free to contact me:
online advertising, social media and SEO
graphic design (print and digital)
copywriting
newsletter design and distribution
website maintenance
Thank you!
