Zara Refund Delayed Two Months After Jeans Return

I bought a pair of jeans from Zara through the online store and later returned them in a physical store in El Salvador on June 22. In the store they confirmed that the return had been accepted and that I would receive the refund, but two months have already passed and I still have not received any payment. During this time I have contacted Zara customer service several times. First they told me to wait 14 business days for the refund. After that period passed without any result, they asked me for my bank account number and again told me to wait the same time for the refund. When that deadline also passed, they informed me that I should receive an authorization email, which has not arrived to this day and the money has not been credited to my account. I am waiting for the refund of 52.95 USD corresponding to the returned jeans and for Zara to finalize this process without further delays or excuses. I kindly request that my refund be processed immediately and that I receive written confirmation once it has been completed.