Advertised web design for only €10/hour in my city but no calls?

I am pretty sure that the reason for this is people are sceptical of these services where there is no established company or even individual behind them.

Honestly I think you may need to go back to the drawing board on this one.

Hard to say without seeing your ads or your website.

Do your ads look professional, and do they use good copywriting techniques? Are they being placed in publications/websites/areas where they will be seen by your intended target market? Do you even know who your target market is? (if your answer is "anyone who needs a website", then you need to go back and study marketing 101).

Does your company website look professional?

What about your website's copy? Does it "sell" you well? And why should your prospects choose you over the gazillions of other web designers who are competing for their business? (if your website doesn't answer that last question well, then your prospects will choose someone else over you, every time).

Does your website feature a "portfolio" section that showcases other websites you have already built? THAT's a biggie, because prospective customers will definitely want to see your previous work before they decide whether or not to do business with you. Even if you have to build your first handful of sites for FREE in order to get your portfolio going, then do it, because you absolute need to have a portfolio if you expect to attract paying clients.

Also, I think you're going to run into a lot of resistance if you try to charge a hourly rate for web design, especially if you're the "new" web guy in town, with zero reputation. How do your prospective customers know that you won't charge them 50 hours of work for a 20 hour job? They won't! An hourly rate implies trust. And trust does not exist in a brand new business relationship. It is earned with each client individually, over time.

I think it's much better to quote a flat price for each job, up front. And don't try to be the cheapest guy in town -- you'd be surprised by how many prospects will pass up the "cheapest" offer, simply because they associate cheap with "low quality". If you do quality work, then charge what you're worth. Your pricing isn't what will make or break you -- your quality of work, customer service, and marketing skills is what will make or break you.

Dropping the price is a 'basic marketing technique' as you put it. However, there is a point at which the price becomes to slow and unreasonable that possible customers becomes skeptical of quality and reliability. Did you make them aware you are doing it for a college project, therefore the low price?

Pricing is critical. Dirt cheap doesn't mean you'll get customers.

Perhaps try raising the price a little? Also, is this basic website that prospects are sent to, up to standard? It's the front door to your business, it needs to look good.

Best of luck.

Perceived Value. You might actually be able to get more clients if you raise your rates vs lowering them. However, this is just one small part of this. As Brandon said we really need to see your website and advertisements to give you any real advice.