Disappointing online shopping experience

I placed an online order more than a month ago, one of the items was a rusty beetle canvas which you were unable to procure. After numerous calls I’ve still not been refunded for the item. I simply requested for the refund to be credited to my account or as a voucher in order for me to use on a future purchase. However, I’m at the point where I no longer want to support your business. Please have someone contact me to resolve this ASAP, it’s becoming ridiculous!