Possible option - pay cash or by bank account. I have prepared the money in advance before even applying for student finance. It is the insecurity how my family will deal with the finances for a few years. It is a big concern to graduate, it is a long process and it takes lots of efforts and money, I cannot afford financial fail.
I am Bulgarian too. I always advise people (not only Bulgarians) to keep a secure option/options for that reason only - to avoid disappointments like yours. With my sympathy - you should travel to Britain much earlier to make sure you've got everything needed for such an application. Applying in British University takes usually more than a year. For me it took two years.
Especially foreigners have requirement for residence too.
In my case I spent 5 years in Britain before applying in university. I made sure I've got NIN, and all the bureaucracy about my residence, plus P60, plus many other documents. First advice (please take it calmly because it is not me to require it) is that you deal with bureaucracy and these people are paid to require from you, and you are supposed to deliver and to cover their requirements.
Well, let me tell you - today I made a phone call to the advisers too and my all evidences are not enough for them.
So today I will call my bank branch/ or tomorrow I will go to my bank branch (whatever) to ask for full print of my bank activities throughout that period of time. They are not happy with one print issued from my bank - they want full cover of that period of time.
That is, how I take it, to ensure they have a real person in front - not only a few invalid papers. They want to make sure you were living and existing exactly the way you declare - with full evidences issued from the authorities.
It is my guess, may be they don't want somebody from abroad to pay from distance and to buy the evidences from distance.
I took it calmly, tried not to get angry (no use...) and to do what they ask me to do....is my advise to you too....
If you have a missing week, my guess is you will need another year residence in UK.....knowing the bureaucracy in UK.....I never found them to compromise the rules......
take it with a pinch of salt and forget and forgive.....it is for every other applicant, not only for you ....
Edit: after giving a shout to my bank, we agreed that I will visit my local branch tomorrow with my request for full print. I was told on the phone that they can issue for me only a copy of my full print. I already had letter from Student Finance to tell me in bold letters that I need to provide originals. What they mean in my case I will understand tomorrow, today is late to visit my local bank branch.
Good luck everybody, just do your home work properly......