I am having some big payment problems with Fotolia and wanted to see if anyone has any input.

I requested my first payment on 7/29 when it did not come through in 1 month I followed up, and they said it just takes a long time.  I waited 2 more weeks, and they told me they paid me to check with PayPal so I checked with PayPal who told me Fotolia did not pay me so I forwarded that message back to support who told me billing would take a look at it.  That was 2 weeks ago.  I followed up again today with no response yet. 

It's been a month and a half, and I am starting to feel like I just gave away $100 of photos to Fotolia, but at the same time would really appreciate my payment.  They are not one of my bigger agencies, but at the same time I am a full time photographer so this is income not a hobby to me.

Any customer service tips would be appreciated.  I seem to be going around in circles.