Plotting mulitple line on Kaplan-Meier Graph

Hi Experts

Not sure on how to plot multiple line based on the filter selection. So if a user selected using filter Stem Brands mulitple products i want to have the ability to plot mulitple lines on the current KP graph. 

I can do the plot for one single line after weeks of trying i cannot get it to work for a single line. 

and note the current is in the right direction for what i am trying to achieve and i am fully aware that its supposed to be a downward decaying curve.

link to file

https://www.dropbox.com/s/yzvxdvi423x0xmc/Test_.pbix?dl=0