Pathetic service delivery on homeloan

My mom and i have a joint home loan account with Standard bank since 2004, I am the one paying the bond. Never has there been a late payment or a payment that is not sufficient. On the 28th of August i decided that i am going to try and settle the bulk amount on the bond. I have paid the loan amount for the month of August then i paid on the 28th of August 2017 R186.000 directly into the Standard Bank home loan account. I then informed my mom to check with SB home loans as i am not currently in SA. they then said to her that i Have only paid R136.000 so then i called the branch, It took SB 2 weeks to locate R50.000. This was all paid in at the same day few minutes apart as i could only pay a max of R50.000 at a time. However these people are now telling my mom that because the due date is the 8th of each month there is no benefits extra as the monies only came in on the 10th, that is absolute nonsense as i have paid it on the 28th and they never followed procedure to check if the monies is there i even sent the bank a screen shot of the payment. They have no compassionate towards people that has been loyally paying them 13 years, my mom was sick and had to be in bed but had to run around doing their work, phoning them. i want compensation for my phone calls that my mom and i made. fuel that was driven out as they charge you for everything even a simple statement. this is ridiculous and pathetic service, how can you even say that we didn't charge for the monies coming in when i have paid the charges on this end for the monies to be paid in that side.