Poor service

As an x employee. You can't rely on this company to send you correct Pension documents. After a 3 week delay I had to send the right fund papers to them to complete and submit. My leave was cancelled and I missed a milestone in my oldest son's life. My leave was suppose to be paid out to me as per the aria manager. My last day of work was 23 July, came August no payment I had to submit this query to the branch on the 25th of August. Why should I remind them they owe me leave if they were the ones that said it will be paid out. It was deducted of my July payslip but not paid in July. 26 August it was sent for approval by the aria manager. Up until today I still can't get an answer from them when I am getting this money owed to me. I have been emailing I was promised an answere Friday. Here we are 21 days later no answere. Why should I wait till 25 September? 2 mistakes made in one month with one employees money.