Refusal of a visit visa to the UK [duplicate]

Applied for a visa to visit my uncle in the UK but was refused giving the following reasons:

They said I applied to to visit my aunt (which I never stated in my application) but brought supporting documents from my uncle stating his willingness to bear the cost of my trip, meaning there's no personal or professional relation between us (actually when filling the form there was a question that went like what's the relation of the person in the UK to you but there wasn't uncle in the options provided so I chose other relative and added his contact details and address so I don't know where the aunt came from, does choosing other relative mean aunt or something?)

Secondly they said I stated in my application I'm a non working student and that I attached a bank statement with a closing balance of over 200GBP and that they aren't satisfied with the evidence of the source or the money is for my exclusive use (I don't really get this point, are non working students required to have a specific amount before applying or what?)

Lastly they said I said the cost of the trip to me personally was 300GBP but I had less than that in my account so I can't sustain myself in the UK does it not contradict the second reason?) they also said I stated I had 300USD for the trip but the cost of flight was 285USD and my living expenses 200USD meaning I'm short of 185 (I thought they just needed an information about these so provided them because my uncle was bearing the cost of my trip so attached all the necessary documents to the invite not knowing they calculated using the money my account, how was I supposed to answer the questions under income in expenditure in the case where my sponsor that's my uncle was bearing all the cost of my trip? Can I apply again? And how many times can I apply after refusal?