Thanks for your response. in the previous application i didn't give a cover letter. can't i explain that my sister wants to give me a treat? can't it be a gift from a family member (an all expense paid trip)? can i also explain that i dont have any responsibilities and the initial figure was put in error, the truth is that is not my monthly expense, and now my sister is my best friend, we are very close, cant she decide to gift me this present? regardless of whether i work or not?

Hello Good day. Please i need help with my UK Visa Application and this is my situation. please please take time out to read my long inquiry because its really bothering me.

I'm a first time visa applicant ( first time travelling) and this is my situation.
I applied for a 6 months visit visa and got declined. i received my passport on the 26th of september 2019. reason for refusal is that i indicated on my form that i will be contributing 200k and my sponsor ( my sister will be contributing 300k) my salary is 183,000 monthly and i also indicated on my form that my monthly expense is 150,000 ( this is not an exact figure, i actually dont track my monthly expenses because i live with my parents who take are of the bills and the only thing i spend money on is my car service maintenance and personal girly maintenance) I'm 34 years old and single. My visa was refused because my bank statement wasn't a true reflection of my financial circumstances according to ECO. I presented my Salary account just to show my salary monthly payment and my sister ( works with Goldman Sacks London as a permanent employee, almost 1 year spent so far) mentioned that she will be responsible for my trip in the invitation letter. I'm about to reapply in one week and these are the list of documents i want to present this time.
1. Cover letter refering to the previous refusal and explaining relevant documents.
2. my employment letter as well as other letters showing the different roles and responsibilities i have handled and salary increments ( i have worked with my organization for 6 years). Letter of introduction from my company and work ID.
3. picture evidence of myself and family members here in Nigeria to show ties, consent letter from my Dad to travel, our land use charge, showing owner occupied property.
4. My sister's bank statement, Pay slips, employment letter, tenancy agreement, residence permit, well explained letter of invitation.

This time i intend to completely remove my bank statements and make my sister the sole sponsor. please remember that she has a good job, although she paid out 5k pounds in august from her account which would be returned soon. does she have to explain this lodgement as a sponsor? please are these documents sufficient enough to procure a 6 months visit visa? also can i reapply again on the 8 of october 2019? is it to soon?.