incorrect billing

In early October 2015 I took out a hospital plan with clientele and requested to be billed on 27th of every month which would mean my first instalment would go off on the 27th of October 2015, the first instalment went off correctly but thereafter I was billed on erratic dates which set me back. I then thought it was just a months error of a debit running off on an erratic date but this also happened in the month of December which was my last straw that lead me to cancel my contract. I have still not received the contract that was supposed to be sent through to me via post for perusal<br>