Poor service by Mondo

I have upgraded my MTN contract on 28 Jan 2022. At the time of upgrading my contract, I was informed that MTN had a handset available. I received no follow up calls from MTN regarding the upgrade/handset. After about 8 days I phone MTN enquiring about my upgrade and handset. I was told that I should consult Mondo their services provider. I have spoken to Modo who told me that there is no handset available and that someone will contact me within 48 hrs. I received no call from Mondo. I phoned on numerous occasions with no success, every time it was said that someone will call me, however, nobody did. On 23 Feb 2022, I called again and requested my contract to be cancelled. I was informed that someone will phone me, however, nobody from Mondo called me. On 28 Feb 2022, I called again, however, none of the Modo call centre staff answered the call. after 15min I decided to forward them an email with no success as well.