Exploited unfamiliarity with the language to upsell expensive insurance

Everyone, please be careful with the Budget car rental store. I've rented cars many times, and this is the first time I've encountered hidden charges that I was unaware of, which were forcefully added. I've applied for after-sales service, and a week has passed with no resolution. Where is the efficiency?

When picking up the car, I was given the wrong contract, but at least the issue was resolved when returning the car. It just took a bit long, both for picking up the car and resolving the issue. Takoma Airport's phone is hard to reach, and the same goes for calling other stores.

Classy and Sophisticated!

I did not use the car. The rental company said I could apply for a refund through the platform. The platform's customer service also confirmed this, but now I'm told it can't be refunded!