Since your firm started out as a telemarketing firm, that may be the primary reason they made their first inquiry. Tacking on additional services may be seen as trying to up sell customers on additional services they don't want or don't think they need. In addition, Integrated Marketing Communications is also an older term that many young people may not be familiar with.
Instead you might focus on offering digital marketing communications, social media and search engine optimization. Create a step-by-step process that guides them from building a business plan, generating a thorough competitive analysis, building a website full of SEO friendly content that serves as a 24x7 electronic sales person, engaging with prospective customers on social media and leveraging PR to generate lots of news stories that can posted to social media and shared via friends and family social media networks.
And if you say you specialize in SEO, but none of your website pictures have "alt" tags, none of your URL links have "title tags," no bulleted or numbered list, you might want to buy a book and learn what is really required for great SEO.
Same thing goes for social media. Your numbers on Facebook, LinkedIn and Twitter are very low for someone that is an expert in this area.
In addition, keep track of your results via Google Analytics. When you can show customers the results for what each type of marketing is delivering, they will give you more and more responsibility because they can see it working.
Please give me call if you like some help building a better digital media presence and developing a better business pitch that will reel in more clients.