Poor service all round

So I cancel my rain Sim at the end of May the process a payment at the month end then we all Done as all payments have been received, to my shock and horror they run another debit the following month with no bill, their bill says I should not have been deducted but guess what they took a payment for no reason so I call in on Sunday the 27th speak to representative who sees the mess says 72 hours to fix it, I have to call again to hear nothing was logged mind you I have the guys email with the proof I sent, I mean this is poor on a higher grade, then some lady today tells me I'm billed in arrears.. what nonsense, I'm appalled at the ethics of some of the company's employees and disgusted that no one has answers for this Ludacris behavior, as company service levels are non existant and I'm being taken for a ride