I placed an order on 7/03/20, order did not arrive...

I placed an order on 7/03/20, order did not arrive (was informed of the delay by the company) so I sourced from elsewhere. I sent an email on 08/04/20 to cancel the order this was confirmed by the company via email on 14/04/20 stating a refund will be issued. Order was then delivered on 23/04 sent email 24/04 to inform them of the mistake no response. I spoke to someone on the phone 01/05 they agreed order was dispatched by mistake and I will be contacted by someone for courier to pick up and my refund issued. No contact, further email sent 06/05 - no response, further email 13/05 - no response. Have tried to call today no one picking up. Please get in touch with me this is a very simple issue to resolve. I did not want to leave a negative review but I have given you several opportunities to remedy your mistake.