Not paying back refunds

I bought items ( two reversible umbrellas, and two camping lights) online from Iconix in November 2017, and received the items on the 12th of December and upon opening the package i noticed that one of the umbrellas was completely damaged rendering it unusable, i phoned Iconix to complain about the damaged item and was told to send a mail which i did, the lady send through a return slip on the 13th of December which i had to complete, the document was send through the same day being the 13th of December, i decided to return both the umbrellas as they were gift and was also noted on the return slip, the items were picked up on the 15th of December, till then i received good service from them, i was asked to send through the waybill document as soon as the packaged was picked up, was done the moment the guy left with the package. On the 19th of December i received a mail from Astrid the lady I've been dealing with to say that i must complete a return form and send back to her, that is the form that i had to send through on the 13th, i forwarded the same mail to Astrid. On the 21st i send a mail to Astrid to find out as to when i will receive my refund as it's been a few days since the items was returned, The mail i reived from Astrid was kind of surprising as i received the same mail from her that she send through on the 13th and the 19th requesting that i complete the return slip, i again forwarded her the mail was send to her previously, after that i heard nothing from them again, on the 5th of January i send a mail to Astrid to enquire about the refund and as to why i still haven't received my money, she rep**** with a mail that requested that i again complete a return slip, i got a bit upset that every time i send a mail to do an enquiry i get a return mail to that request to fill in a slip, i again send thought he mail as send previously with both the documents attached, on the 8th i received a mail from Astrid to say that she didn't receive any of my mails with the documents being attached, but later that day she send through a mail confirming my bank account, i found it odd that she could confirm my bank account but just earlier she said that she did not get any of my mails, and my banking details were supp**** on the mail with all the attachments, On the 9th she send a mail to say that the monies have been refunded and that it would take up to 10 days to reflect in my account and this came after i had told them that i had contacted a lawyer and that they will be held liable for all cost, on the 12th of January i received a mail from Astrid to say that the refund request had been returned, which i find very odd as the account details i send to them is the account i use every day, i made double sure that the account was correct before i sent it to them. I resubmitted the bank details to them, and noticed after i couple of minutes that the mail bounced back, i waited a day and resubmitted the mail again, the same thing happened, i decided to send a mail again this morning to see what happens, the mail went through but a few minutes later the mail bounced back. Iconix takes your money and send you damaged goods and when you return the items they take the items back and you never see the money for the items returned.