You can have a go at Nipa but the fundamental problem lies with the Bangladesh authorities. Student visa clearly states taht one can work up to 20 hrs/week. If you are lucky enough to get a job it will help you to maintain yourself but you still need additional funding to continue with your studies.
The problem is that we are going through a very bad patch with economy and job market is very poor. I suggest that Government should take cognisense of this and check who can afford to come to England to study. There are lot of peo[ple get bad advise eg, that "Just get a student visa then do a F?t job, That is not going to work now.
Regards
Pin2