@Bluelagoon02 Some ideas to add for consideration…
For immediate here and now money, she could use her language skills and provide online conversation practise and coaching to pupils studying at GCSE/ A level. Also, she could coach students doing Business Studies at A level. Companies like Tutor Crunch - there are a few good ones - are worth talking to.
Tour guiding companies always need guides that are fluent in European languages. My sister guides visitors who are French and German who arrive via Dover and Southampton and day-trip to London, Canterbury and other south coast places of interest.
Casinos are always looking for people to train as croupiers - there is a high dropout rate because of the antisocial hours.
For medium term money, she could train as a management accountant or an auditing accountant. This would directly support her Business Administration aspirations and they take people at all levels (GCSE, A and degree level). The thing with accountancy is that progression is based on passing professional exams - similarly for Purchasing and Supply specialisms. Companies like AZETs and RSM are always advertising for trainees. They seem to have a rolling recruitment process.
I would also echo those who suggested the Civil Service. They train you well and training in being a commercial/ contracts person is directly transferable to the private sector.
Finally she could also consider the military. And apply for a short service commission or one of the admin trades. Both would give great training and don’t necessarily involve being sent into harm’s way.
It is very dispiriting being continually knocked back. I hope she gets something soon.