That's not an apology, as written. You say you did something wrong and say "we hope that you will accept our apology", having not actually given one. Maybe English isn't your first language, and so you don't know the difference between "accept our apologies" (which is a formal/distant apology) and "accept our apology" (which refers to a previous apology).

Also, good apologies come with admission of fault and steps you'll take to make sure you don't make the same mistake again.