********** Package activity

I have been a loyal customer to vodacom for 16 years. In July 2019, I went to upgrade and change my package. They put me on to the wrong package and every month for the last year, I have been trying to get this rectified. They cannot assist you on the phone so you have to constantly go into the store. In June 2020, I was put on to the correct package and now they say they do not owe me a credit as they did a "free" migration for me. I signed for a Smart S Top Up contract and was put on to a Smart M Top Up and being charged for it. You **********ly put me on to a wrong contract and now say you migrated me and do not owe me any credit, How is this possible? Secondly my contract period was also extended with your so called free migration. My patience has now run out!