i thought it was a bit harsh by the school , anyones thoughts?
I have to agree with all of the above comments.
Renewing an SEP Class Rating requires exactly the same actions and qualifications, regardless of the Licence to which it is attached.
There is no justification for a higher charge.
I think that Foxmoth's advice is exactly what I would do in your place.
I would see if you can talk with an adult, then explain the position and ask if they want your business or not, personally if they still insisted on this I would take my business elsewhere anyway...
MJ