Double Debit Order and payment issues

O have been using Wetility Energy for the past 8 months. In the time period I have been experiencing double debit orders on my accpunt which result in a negative impact on my Credit score as I could not pay my other accounts. I have been trying to communicate to Wetility via cellphone and email but no luck. 2nd of September I received a Email stating that my account is up to date, the following day I receive a email from their lawayers sueing me for R16 000 for unpaid funds. The system that they use is malfunctioning. So I would advise that if anyone would just Wetility Energy that they make double sure of their payment each month.