Bad customer service and return policy

One Day only should be reported for their bad customer service. I ordered and two pairs of shoes in a size 6 and the items arrived in a box which were size UK 6 but both pairs of shoes were a size UK 7. I have sent several emails to ask for them to collect and send me the correct size. They do not have a contact number on their website so you can only email them and the only message they have on the websit for the slow responce is that due to COVID and being on short staff responding will take longer. It has been 3 weeks since my initial emails and I have not had a response. This is the second order i have made that there is an issue with the item and they do not respond to my emails at all. This is unacceptable that they are not attending to queries or do not respond to their customers. I am now stuck with shoes that don't fit me. If you order from them I will be very careful since they are not going to respond to you if you have any issues with the products.