If you purchased an operation service on Taobao and are not satisfied, but the seller is unwilling to refund, you can take the following steps to resolve the issue:

1. Communicate and negotiate: First, communicate with the seller and explain in detail your dissatisfaction. Try to compromise with the seller to see if you can reach a refund agreement or other solutions.

2. Submit a complaint: If negotiation with the seller fails, you can consider submitting a complaint on the Taobao platform. Log in to your Taobao account, find the "Complaint Report" button on the order details page, and then fill in the relevant information according to the instructions, describe your problem and provide relevant evidence.

3. Contact Taobao customer service: If the complaint fails, you can contact Taobao customer service directly. You can find "My-Customer Service and Help-Online Customer Service" on the Taobao App to communicate with Taobao customer service in real time, or choose other contact methods, such as phone, etc.

4. Apply for refund arbitration: If the above methods are ineffective, you can apply for refund arbitration. Log in to your Taobao account, find the "Apply for Refund Arbitration" button on the order details page, fill in the relevant information according to the instructions, submit a refund arbitration application, and the Taobao platform will intervene to handle it.

5. Seek legal assistance: In extreme cases, if the loss is large or involves illegal behavior, you can seek legal assistance, consult a lawyer and take legal measures to protect your rights and interests.

It should be noted that each specific situation may be different, and it is recommended that you make choices and actions based on your own situation. At the same time, we also remind you to pay attention to choosing sellers with good reputations when purchasing, and carefully read and understand the purchase contract and refund policy.