In Alibaba store operations, if you encounter malicious refunds, you can take appropriate measures based on the actual situation.

Here are some suggestions:

1. Collect evidence: When you suspect that the buyer is refunding maliciously, you need to collect relevant evidence, such as chat records, order information, product photos, etc., to prove that the buyer's behavior is indeed malicious.

2. Communicate and negotiate: Before refusing a refund, you can try to communicate with the buyer to understand the reason for the buyer's refund and see if it can be resolved through negotiation. Sometimes, communication can help discover misunderstandings and avoid unnecessary disputes.

3. Platform rules: Understand the refund rules of the Alibaba platform and ensure that you follow the platform regulations when handling malicious refunds. Sometimes, the platform will have some protection mechanisms against malicious refunds, which you can use according to the specific situation.

4. Refuse a refund: If you determine that the buyer is refunding maliciously and you have sufficient evidence, you can refuse the refund application. When refusing a refund, be sure to clearly state the reason for the refusal and provide relevant evidence.

5. Complaints and reports: If the buyer continues to make malicious refunds, you can file a complaint with the Alibaba platform. The platform will review the evidence you provide and may impose certain penalties on the buyer's account if it is determined that the buyer has indeed engaged in malicious behavior.

It should be noted that when handling malicious refunds, you must ensure that you have sufficient evidence and comply with platform rules. At the same time, try to avoid verbal conflicts with the buyer and try to resolve the problem through communication and negotiation.