Taobao seller didn't specify the payment date and didn't send a payment notice, which caused me to miss the final payment. Can I get my deposit back?

First, you need to communicate with the seller's customer service. Why didn't you notice to make up the money after arrival? It may also be because the seller has never arrived, resulting in the goods being removed from the shelf. Find out the reason and ask the seller to refund the deposit to you. You can tell her that if you don't refund the deposit, you can complain to the Taobao clerk. Speak well and don't get angry at once.

Second, if the seller ignores you or refuses to give you a refund, you can take a screenshot of the communication record with the seller, complain to the Taobao clerk, tell them that they didn't inform you in time to make up the money, and ask the seller to refund and compensate you for your losses.