The "YOU HAVE REACHED THE MAXIMUM LIMIT. TRY AGAIN LATER" issue is rampant it is coming to people who have either done several transactions or have done high value transactions.
The cool down period is said to be 2-6 days but only experience sharing can show the pattern.
This timeline for cooldown proved to be correct. The same person also divulged that this MAX LIMIT cap is dynamic in nature from 6-8 lac or number of transactions. Meaning if you do a 6 lac payment or multiple small transactions the result will be the same.
Additionally the VISA/Mastercard issue will be resolved shortly there is an issue with the pending payment to the service provider and given that it's almost March aka the FY end things have to be sorted.
At least after every 4-6 hrs check the setu website for the VISA/Mastercard payment option also the site will be sluggish as they are working on it.