It will depend on what grounds you were refused
320(7a) is the most favorable possibility for you, since you aren't actually banned yet and can reapply even though an extreme level of scrutiny will be applied to any further application
You should note that because this application for entry clearance has been
refused under paragraph 320 (7A) of the Immigration Rules, any future
applications may also be refused under paragraph 320 (7B) of the Immigration
Rules
General grounds for refusal
You can reapply BUT :
For this, you are extremely encouraged to get the services of a legit (there are many agents that are far from legit) immigration law solicitor for advice as a single mistake on any application will likely trigger a 320(7b) refusal which entails the actual ban.
Immigration adviser is a regulated profession in the UK, and all non-legal professionals (sollicitors and barristers are regulated in other ways and aren't in the OISC registry) are to be registered under the Office of the Immigration Services Commissioner. You can check if a company is legally regulated by asking them their 10-digit OISC number and typing it on the OISC site.
If you are refused under 320(7b) now, you're very out of luck as you're already banned, and automatic refusal is warranted on your case for 10 years.
In this case, judicial review is the only way you can try through a solicitor (or just wait)