pathetic service provider

hi I called mtn customer care about 3 weeks ago to temporary block my contract no. coz I lost or miss placed my device I found my phone on Friday 3rd March so I phoned customer care about 19:00 on same day & was told error unblocking sim but give it 24/48 hours for the sim to be unblocked & now have called about 6 times & every agent said they escalated the issue & now it's gone 64 hours & still not active I even sent emails to customer care & still no joy thus is how mtn treats their loyal customers coz I was never in arrears or missed a payment being with mtn for I can't remember how long their service is vv bad now I got a good mind of stopping my debit order which is due 2morrow now I'm thinking twice about doing upgrades with mtn I got 5 contracts with mtn but now as the time is up for upgrades I will cancel & use the no. with their opposition companies