Shocking service from MTN actually

I have never in my life known of such bad service from a Cell Phone provider. We have been trying for 2 months to 1. Change a package, 2. Get feedback, 3. Get assistance from the service provider to assist 2 elderly people. Now they have gone and taken R1300 off the account whereby the package was changed to R299. MTN are DISGUSTING and offer NO customer service. I suggest they close their doors rather. Please can someone contact me immediately to resolve we will then cancel our contract