Schengen Visa

I'm holding Russian passport, I want to visit germany on summer. The issue is I traveled to Turkey many times, for russian we don't need a visa(visa free), in the last visit they told me that I can't visit turkey before 3 monthes because I stayed over 90 days in 180 days, actually I calculate them I thought that I can visit turkey because in the last 180 I stayed there only 53 days but I still do't know how did they calculate them and they put two cancelled stamps over two entry stams.

I heard that if I want to apply for Schengen Visa maybe cancelled stamp will effect the empassy disicion, what should I do ?

What if I visited turkey again after 3 monthes, will they ignore the cancelled stamp once I enter again after a while?

Hope someone could advise me about that, Thanx in advance.