Twisp damaged my device

I took my twisp to the twisp Kiosk at century as I usually take my twisp to get serviced and coil changed at least every two weeks, Last week I took it through to centurion mall the lady at the kiosk firstly said she could not service my twisp as she did not have any demo liquids to fill my twisp back up with so I told her its fine just leave it empty and I will refill when I get home, she then did something weird to my twisp because when I got back it was not pulling correctly and did not seem to work properly I asked where did she get the liquid from and she said she put back the liquid I had but the liquid looked black and when I gave it to her it was much more clear. Ever since my device does not seem to be working correctly. It does not pull properly and is leaking. Please help I paid a lot of money for this twisp Aero and have had to revert to smoking again whilst my device is not working.