If the account you are posting from is the below standard account, you seem to be selling 4 or 5 items a month, which is very low.
You have details constantly in your seller dashboard in the affected account - you need to constantly monitor these metrics and take action well before you arrive at a downgrade
7% seller cancelled orders or unresolved cases is extremely high - you are allowed 2% total - 0.3% or max two unresolved cases. You need to change.
Sanctions will increase if no improvement is made within the next two months - you can pull it back quickly if you can improve - post same day - load tracking as soon as dispatched - stop selling items you cannot deliver - ie stop cancelling - respond and resolve all cases opened - do not hope they will go away.
15% late deliveries is enormous given that uploaded tracking validated by the carriers website shows date of dispatch which protects you - no tracking or tracking validated by carrier after dispatch date will count against you - you need to up your game to get above standard - aim for top seller - it will help in the long run.
It is I am afraid down to you to improve
