Life policy lost of after many years of payment

I lost a life policy which I paid for many years due to the putrid service of Liberty staff. They mixed up my payments between two policies, failed to re-allocate my payments to the correct policies, resulting in more and more monies being required to be paid, which I did, only to be requested at the end of month's of emailing to complete a re-instatement document with new clauses, that were now against me. That was highly preventable if my payments had been allocated correctly from the very outset.