Yes, what you have done here is wrong.
You say in your first line that “you approve our delivery without a comment”. In other words, the buyer has accepted your delivery, and not left any feedback. This happens. This happens to about 30% of our orders, and you just have to accept it. Some people don’t like leaving feedback, but it’s their choice, feedback is always optional. What you should have done is carried on looking for new work and completing any other orders you have. Instead, you’ve hassled your buyer about leaving a review, and the buyer has complained, which they’re well within their right to do.
Your messages are pushy, especially seeing that you send one right after another. What if your buyer is busy, and they’re getting notifications on their phone from Fiverr. You open them up, and it’s a seller you dealt with asking you multiple times to leave them a review.
No, you didn’t specifically ask for a 5-star, or a positive review… But honestly, with 2 TOS warnings already, you really shouldn’t do anything that puts your account at risk at all. You can of course ask Fiverr to re-think, but from here, it doesn’t look good.