Bad customer service

A service agent called me to offer a wireless tracking system with zero installation costs for R99.00 per month, which is less than what I was currently paying.

However, after making the change, my debit order dated 1 March 2025 has increased from R159.00 per month to R341.76. Emailed Netstar, received a response rectifying the amounts and then the query was closed. Emailed Netstar agsin a couple of days later, the response was my email is forwarded to retentions. There has been no communication from Retentions.