Voucher/Money to help with Interview Clothing/work wear

I am on U.C and im due to attend a 4 week retail course (if im accepted onto the course after an interview), with the prospect of the job at the end of it. I have had one interview at the job centre where a lady explained what would happen on the course etc. To be selected on the course I have to attend an interview. I have no interview/ formal wear and was told if I needed help with the expenses (which I do), I am entitled to some sort of voucher for matalan I believe, to help me purchase smart clothing for an official interview. Anyways, I went to the job centre today and had an appointment with a different work coach (my work coach was fully booked for that day), I was then told that they only give them out for 'formal' interviews; and because he rang the centre that would interviewing me and they said people can come 'smart/casual', he proceeded to tell me I wasn't entitled to the voucher at all. I told him that I was told by my advisor that its for anyone that needs help with interview, and work wear costs. I now have to pull out for full costs for interview clothes, and buy my own work wear if im accepted onto the training course, because I will be using my own clothes to be trained for 4 weeks. I am very grateful that they will help me out with fare costs, I am very grateful for any help with costs, as I have to pay board and live off the rest of my U.C payment for the rest of the month, as well as buy food shopping etc.
I just feel I was majorly misinformed by that work advisor, and felt he wasn't listening to a thing I was telling him. My old 'smart shoes' are battered and I couldn't possibly wear them to any sort of interview, I told him this and he said 'could you not just clean them up with some polish', he said it in a demeaning way as well, as if I hadn't already tried that. I also remember when a family member was on JSA and they had all their interview clothes bought for the, another friend on U.C was also provided with costs for interview clothing- No matter what the dress code was.
I flat out told him I needed help and couldn't afford to buy an interview outfit and work wear. I am a bigger girl and decent smart/casual clothes for bigger girls are not cheap. I'm going to be over a hundred pound out of pocket. Because I need everything; shirt, smart shoes, smart trousers etc,and then other trousers and shirts for the training course if im accepted. In the end I felt like I wasn't getting anywhere with him, So I said before I left 'I will have to wear old jeans and just buy a new blouse then'. Because thats all I have; hence why I needed the voucher today or some sort of help.
Can anyone advise me on what I should say to my actual work advisor about this situation? and do I sound like I have been misinformed by the random work advisor i was put with?:undecided:think::think: