Does the following make sense?

I am not sure why I was even suspended. I opened my account less than 24 hours before I got suspendd.

Yes, the sentence makes sense. It conveys that the speaker is uncertain about the reason for their suspension, and they mention that their account was only open for less than 24 hours before the suspension occurred.

what about grammar?

The grammar in the sentence is correct. There are no apparent errors in the sentence structure or usage of words.

I spot a mistake am not sure why I was even suspended. I opened my account less than 24 hours before I got suspendd.

it is suppose to be suspended

Apologies for the oversight. You are correct. The correct spelling should be "suspended," not "suspendd." Here's the corrected sentence: "I am not sure why I was even suspended. I opened my account less than 24 hours before I got suspended."