5 Hour Usage drains afer just TWO messages because I recently purchased the credits

I have opted for buying credits to continue my working by paying for credits. The credits drained as per the decent usage. My 5 hour limite resumed. The same limit exhausted with just two messages. like two simple tasks.

I belive the chatgpt is watching how needy you are and exploiting the customers requirement with whatever the plan you have. I have pro plan and 5 hours usage limit should work as it should be.. I dont know whom to contact and what will be the outcome but this is absolutely unfair practice. Seems okay for many folks but something is not ethical and logical here... and need serious intervention.