There are some methods for reference:
1. Check the historical reputation of the store and see if there is any suspicion of brushing the reputation.
2. If there are many reviews and bad reviews in the store, you can contact other buyers who give bad reviews and jointly complain.
3. For the case that you are cheated, it is best to have an authoritative appraisal certificate to prove that the merchant sells fake goods or other irregularities, and upload it to Taobao as evidence.
You can apply for a refund for a transaction that you think needs a refund. If the transaction is confirmed, you can apply for after-sales (when the seller joins the consumer protection agreement).
If you just think that the seller is expensive, the service is not good or there is no evidence to prove the quality is wrong, then