Botched upgrade@!@!@!@!@!@!@!@!@!@!@!

We did an upgrade with MTN online in December 2019. They send us the incorrect package and we returned it to a MTN store as per their instruction. I tried canceling the upgrade numerous times without any joy. 4 months later and they still unable to assist me. I have never received such horrible service from any other company in my life! Mtn retention department is just putting you through to a other department and that department puts you through to retention department that tells you sorry its a robot that is in the department that has to assist. I am now really frustrated.