I just had eye surgery this morning so it's very hard for me to see. I think if you just put a brief cover letter explaining what you've given why you've given it and the only way you can get anything super official is at the end of the month.
It almost appears as if you're saying the cancel visa application is a choice you can make especially since it's been sitting for 3 months so is this a choice to cancel the application or has the application been canceled?
Anonymous participant your not supplying good info. Did your mother write a letter and provide bank statement proof? Regardless, it's not a given in your circumstances, possibly the employer sponsor might fly.