"Mrs Kotrri said that since the letter from Zara's legal team, she had replied to 10 emails with information about her business, detailing invoices, stock, staf

"Mrs Kotrri said that since the letter from Zara's legal team, she had replied to 10 emails with information about her business, detailing invoices, stock, staffing and articles written about it." Mrs Kotrri seems like a nice lady, but this was probably a mistake. She had no requirement to tell them anything, and this was never going to make their lawyers back down. The lawyers will just pull out any detail that might help them in their future case, and ignore any and all details that don't. I expect it probably would have been best to just send back a letter from a lawyer-for-hire denying any hint of infringement, and then shut off communication.