Bad non existing support service

Bad non existing support service Their phone always saying high volume of calls and then cuts your call. They say option of 3 months but you buy something on the 26th March and they say your 2nd payment will be on the 1st April, there was no 30 days in between . Debit order goes through on a day that is not your pay day then there are no funds, you try to use the app for settling the amount but unfortunately you can't get through their system as when you try to log in it is just busy synchronizing and then interests continue to grow. Try to use their WhatsApp and chat still can't get help and you are referred to the email but unfortunately still there there is no help.