Top-up data bundle lost due to TELKOM ERROR

I have 2 data bundles but the one expiring soon is not used first do it EXPIRES and is lost. Telkom needs to rectify this. I have a FREEME package. When it's data expires, I buy top up data. When there is still data left into the new month, Telkom depletes the newly loaded FREEME data which has 1 months expiration. Since the top-up data expires in a few days, it is lost....this is losing money for clients.