Upgrade data

I went into mtn eden meander on black friday Nov 2020 to upgrade my data contract which was 100gig data with a home router. They told us we must do it online which we've done. After 2 weeks we received the wrong router. We took it back to mtn to be return to mtn direct. Since then we spoke to Masabatha online and to the manager Fazila. Since then no one came back to us and replacement was done yet and I sent a few messages everyday to both of them but no one respond to anything we send to them. We waiting now for that router 1 month and 5 days without response