Very unhappy with the service

Good Day

I am highly upset with the service provided ,I have called in on the 04th April to change my debit orders to the 31st which was supposed to be done ,On the 20th my debit order still went off and have been reversed, on the 21st at 8:30 I called In to verify why the debit order went off I was told that it could only be effective first may? Why would that have been if I have contacted almost a month prior ,I have tried speaking to the consultant who made like she cant hear me and then dropped the call ,I called in again and once again made as if she could not hear a thing while I could hear very clearly,network I then gave up trying to contact this *********** people whom does not advise you about the proper procedures, I have had this with a previous network and therefore chose your network, I think I have made an extremely bad decision as your service is 10x worst ,

I wish that I was told prior that they could not have assisted me and now I am liable to pay multiple fees for something I have tried fixing before happening