A very frustrated customer

Hello,

I would like to inquire how I escalate a customer service issue. 

I have been trying to get a simple product issue resolved since April 20th. I have been bounced between different teams and individuals, emails and discussion threads, been asked for information and documents I have already provided, asked to attach files to discussion areas that don't accept files, had live chats simply end, unresolved, with no follow-up, two different 'leaders' on the Social Media Group (why is a social media person handling a product issue??), and today I just got asked AGAIN for documents I've already provided. 

I've experienced terrible online support before - we are all getting used to it - but this is next level. If there is some way of making a more senior person aware of this situation, I would be very grateful.