No service from Mondo

Did I upgrade on 10/04/2026 on my data sim card and was told I will have my data within 2-24 hour. This is now 72 hours later and still no data. I already had to buy R150 data to be able to do business with my phone. 4 phone calls later and still nothing. Mondo say its MTN problem, MTN say its Mondo problem. I would like to cancel the upgrade that was done with Mondo. I did my upgrade through Mondo so I would say that it is their responsibility to make sure I receive the correct package for my upgrade