Bad service from standard bank

I have been a customer of standard Bank for many many years. I purchase all my pre-paid electricy via the banking app on my cell phone. Immediately after each purchase I receive the details via SMS. For the last 5 occasions I have not been receiving the details which resulted in me having to phone *** and the agents would assist me with the voucher details. Last night 25.11.2019 I once again called however on this occasion the agent(name known to me could not assist me as the centre for assistance was closed at 8 although I was previously advised they close at 9 and the agent did not have access to the system to assist me. After consulting with a colleague who had access to the system I was advised that there was a problem loading the system. I spent the better part of not sure how much airtime from cellphone and thereafter spent more than half an hour on the neighbours land line still without success. As of this very minute I have still not heard from standard Bank and am unable to call them due to no airtime. Where to from here as I am merely a man in the street according to standard Bank. The bottom line is their attitude is sit in the dark until the morning and am still in the dark.