Constant Billing Errors

Upgraded my fiber line to the new Openserve Premium. Agent was not aware of the package and upgraded me to Openserve Pro which is almost double the price. After asking as to why the extra charge the agent got stroppy with me saying that I do not understand. When called in again to clarify got charged, then credited. Product finally got changed but billing is still not correct. Invoice came in at the correct price - debit order went off for the full amount.

Logged support call - no answer after 3 working days. Called in 6 times - no answer all 6 times after 10 min each call. Tried the whatsapp bot... kept apologizing for taking long.

Utterly useless and disappointing. I want my credit and billing to be correct. Why must I pay for an agent's error and lack of knowledge