Unprofessional Conduct

I requested a quote 25th April 2022, followed up again on the 26th and said it’s for urgent delivery. I received the quote and paid within a hour. When I follow up on delivery the response was they closed for the 28th and 29th April. I then requested a refund without handling fee since this was not communicated upfront. I’ve yet to receive any refund after several telephone calls, email and WhatsApp.