Is There No End?

I received notice from my health carrier that they were cancelling my insurance for nonpayment.   In the same envelope was my payment.   They claim that the check I sent from Minneapolis on 3/17 arrived with a postmark from St. Paul on 4/5.  This is 5 days late.  This is simply a scam -- pure and simple.  Furthermore, after having sent my payment $229+ they sent me notice that my payment was owed in the amount of $159+ so obviously there has been an overpayment of $70-some dollars.  One would think that would be applied to the outstanding balance.  But what's more, this is consistent with this company.  Since January they have sent no less than 3 different coupons changing my monthly premium.  So what is the actual amount owed?  And even more interesting, in February I had an email conversation with an account rep who told me that I had a $159+ credit -- the same amount they are now saying I owe.  I've since made calls to this same woman for help with no return calls. 

I'm so tired.