thank u all for ur advice.

1. I put her in a bigger pot.
2.put N P K containing granule fertilizer into the soil.
3.some liquid K fertiliser to use once a week.
4. my new flat had short light time in the balcony. I use now 6 hours sunlight (I live in Turkey), 8 hours Paulmann plant reflector lamp R80 75W. (how about white flouressent light. is it ok aswell)
5. pruned all the leaves in bad conditions an the big leaves whitout flowers.

she looks better and the flowers made big progress in two days.