Refund Delay for Defective Phone

I am writing to express my frustration regarding the refund for a defective phone I purchased from Cash Crusaders. The phone was returned in May, but I have yet to receive the refund. I was recently informed that the delay is due to the card used for the purchase being cancelled after a bank security issue. I understand the need for a new process, but the delay has been excessive and inconvenient. Could you please expedite the refund process or provide a clear resolution timeline? I appreciate your prompt attention to this matter.