how can you take wix to court

absolutely devastated by the way wix have handled my payments. iv only just set up a website to sell some stock, I provided all my company details, bank accounts passport even companies house registration details, all shipping invoice from the sales and notification of item being signed for. whilst this was going on I had a couple of large sales totalling £1500. I contacted wix on when the payment would be released, they informed me. in one week as the documents were being verified, BUT I could post the items out, which I did. its been 5 weeks and 5-7 hours worth of phone calls, and today I received a email stating all the payments that were made have now been returned to the customer, as they have all be clawed back by they banks. I contacted one customer they said they have had done nothing with their payment goods were received as described and good feedback was left. no explanation as to who clawed the money back, why wix has issued the refund back to the customer. this has relay wiped all my profits from my small business. absultley disgusted as to how been treated. PLEASE CAN ANYONE HELP ON WHAT WOULD BE NEXT BEST PRCESS IN DEALING WITH WIX