I suffer of social anxiety and depression related to it. I tried different drugs (several ssri, benzodiazepines).They didn't help me in no way. What nex?

Social anxiety. Did you also do therapy? Medications alone will not be sufficient. The combination of medications with cognitive behavioral therapy is the recommended treatment strategy. In regards to antidepressants, you may ask your doctor to try snris like Effexor (venlafaxine) or cymbalta. In some cases augmentation with mood stabilizers/atypical antipsychotics might be necessary.
Combo Treatment. I would get with a good psycologist who works with a psychiatrist and let them help you. Some people need both medication and therapy.