Gloss Partners - Missing payments from October and November

GlossPartners haven't paid two invoices we have send them. I've tried to reach them many times via email, Skype and their site but haven't got any answer. The older invoice was already sent in October and the second (and the larger amount) in November. The total amount of the invoices is 1706,39€. We wished this would have been solved without this complain.

Dear Affmarketing,

Please let us know if there are any updates regarding this ongoing complaint. Please note that, in case you fail to respond within the given timeframe, we will consider your case unresolved and it will be closed accordingly.

Thanks in advance for your cooperation.

Hi there,

We haven't heard anything from them so no updates.