this is my first post on immigrationboards.. i am on a PSW visa which is expiring tomorrow 8th April 2013. I got admission in University in Feb and doing my MBA. I got a CAS from university and have applied Yesterday 06 April 2013 for my Tier 4 visa from a post office. There is a very strange problem now...
After posting the application I came back home and checked the UKBA website..found out that the fee have changed

the application forms have not changed on the UKBA website.. they are still the same... version 10/12. and they show the same fee 394.00GBP.
Now i am scared that the ukba will return my application as invalid because i did not pay the correct fee... i have paid through my credit card and not postal order. Some important points to note here are:
Visa route applied for: Tier 4 General Student
Visa Expiring: 8th April 2013
Visa Applied: 6th April 2013
new Fee applicable: 6th April 2013
Application form: remains unchanged
MEthod of payment: Credit/debit card
amount ticked: 394.00 gbp (because its this for postal on the form)
Postal: Next day delivery
another minor thing is that the post office from where i posted STAMPED the parcel instead of putting a sticker of that date.. but i have the postal receipt saying 6th April 2013 as the posted date.
please please help me because this thing is stressing me a lot.
thank you all in advance for all your help..