YD Beauty Boutique, Cape Town, *****s!

I am a Graphic Designer who did the log and CI for the Salon named 'YD Beauty Boutique' in Cape Town. The owner ,Yolanda, only paid me for half of the word. Her argument was that I did not deliver on my original deadline time, which i did miss with a few days due to delays, She did accept and was satisfied with the entire branding package, then i has to asked her TWICE so tend me info for he company profile i had to design for her, she took days to reply! I sent it to her along with invoice for the the due balance, and she rep**** that she wont pay as i took too long, YET she gladly accepted ALL the files and profile i sent her, basically being dishonest and *****ing as a matter of fact. Easy to blame the designer for taking longer, when she also delayed on her side. Is this how she operates? Good luck...