1>Let's say that I purchased an item(in this case Ut 61e) & the product turns out defective or goes bad in 15days,then how would tabao agent can help in that case ?
Really, these questions hardly make sense. A Taobao agent is no magical being. It is just some Internet business you can hire to act on your behalf. If an agent will help you even after the deal is done is anyone's guess. An agent will do what he likes to do. That could range from doing nothing to doing everything for you to get a replacement.
2>Should tabao agent provides return shipping reimbursement like Dx ?
An agent will do what he likes to do. That could range from providing nothing to providing everything for you to get a replacement.
3>Is there any way that Tabao agent can cheat in any way ?
In all the ways people can cheat. A Taobao agent is just some Internet business, typically located in China, doing business with
foreign devils. They can pull all the tricks a business, an Internet business, and an Internet business in China can pull, especially when the customer is a
foreign devils and has zero means to go after the agent. E.g. disappearing with your money over night, or sending you a brick instead of the multimeter.
That, and the seller might cheat on the agent. Using an agent means it becomes a three-party deal, and if any of the parties breaks the deal, there will be tears. How well an agent can or will protect you from the cheats of a malicious seller is something you will learn when it happens.