The Accounting Technician is a well recognized course and if you do well in it, you get exemptions from the accounting exams.
I think that the course will put a lot of what you are currently doing in perspective and it would show you how to produce the trial balance and accounts.
The Business Studies degree is more general and vague and won't really improve your hands-on skills.
The ACCA also do an accounting technican course which is a more favourable route as it leads directly to the professional accountancy road - if you want to go there - and is internationally recognised