Telkom cell phone contract

Telkom is losing it now. I been a loyal customer for years. I was due for upgrade on 29 April 2025,chose a package and the new device for R1600 and R200 respectively. The statement came and I had an amount of R3027 to be paid,when I enquired at telkom mall of Africa where I upgraded,they indicated that it's a system error. To make it worse I paid the R3027 on 22 May 2025 yet my service has been blocked due to non payment. Can telkom explain what is going on here if this is how they treat their loyal customers.