I made 2 small orders for our company 10 months ag...

I made 2 small orders for our company 10 months ago. I paid at the time of purchase. I then had to chase them for over a month with 4 or 5 emails and also a phone call to get the legal invoice document for our company. Then 5 months later I received a remittance slip from them. I had to Google what it meant - basically they said that we owed all the money due for our orders. I then sent them screenshots of my bank statement proving my payment at the time, plus also the invoice including the words 'payment received with thanks'. I then heard nothing back, so (obviously) assumed they had sorted out whatever admin mishap that'd happened. Now another 5 months on, we received a red-topped letter from a debt collecting company demanding the money, and also adding a charge to it. We rang them back immediately and I told them the exact dates and times I had made my orders and gave them all the details. I am now awaiting to see what happens next. It is a real shame as the aprons I received from them are great, and if their customer service / admin had been in line with the items I purchased, I would have bought more from them in the future for sure. To be honest at this point even giving them 1 star seems like a compliment. They have taken hours of my time up faffing chasing up proof of this and that and caused me stress. Also I would add, they have a French version of their website (we are a French company), and yet despite giving them our French TVA number at the point of sale, they still charged me UK VAT, and still, despite being chased and chased have not been able to produce an invoice without UK VAT. Never buy from these guys.