CTBids uses PayPal for payment processing. Refunds issued back to you will depend upon how you paid.
Here is what PayPal lists about refunds and timing.

Where is my refund?

We send all refunds back to your original payment method. The time it takes to receive your money varies by payment method. In some cases, refunds go to your balance account in case we are unable to credit your original payment method or when you choose balance as the destination.

First Step:

Second Step:

Third Step:

Refund Processing Timeframes

Credit card (including PayPal Credit)

When you pay with a credit card, a refund usually takes between 1 and 2 billing cycles, depending on the card issuer.

We’ll still send a refund to a canceled or prepaid card. Contact your card issuing company to access this money. For checkout transactions, you may use the bank reference ID shown under Activity for tracking refunds with your card issuer.

Debit Card 

When you pay with your debit card, it will generally take up to 5 business days for your refund to be completed, however, depending on your card company, some refunds may take up to 30 days. For checkout transactions, you may use the bank reference ID shown under Activity for tracking refunds with your bank.

If we are unable to apply the refund to your debit card, we will add it to your PayPal balance.

Bank account

When you pay with your bank account, we’ll automatically transfer the refund to your bank account. Once issued, refunds usually take up to 5 business days to complete.

Some refunds may take up to thirty days, depending on the status of the payment at the time the refund was issued.

PayPal balance

When you pay with your balance, the refund will go to your PayPal Balance on the same day.

PayPal balance plus credit card

When you pay with your balance and credit card, the refund will go to your PayPal balance and credit card. Once issued, the refund will go to your balance on the same day. The refund to the card can take between 1-2 invoices, depending on the card issuer.