Amazon customer service sure is customer friendly. A bit bumbling, but customer friendly.
Recently I did an Amazon Prime one month free trial, after which they would bill me $99.
During the trial they had a one day promo where Prime would cost just $72. Since I was in the middle of the trial I emailed and asked if I could sign up for that.
They told me they would refund the $27 difference after I was billed the $99.
When I saw I had not been refunded the $27 I emailed them yesterday and they said they would refund it within 2 business days.
Today when I logged in I saw that my Prime account had been canceled.
So I emailed them again and asked them to reinstate the Prime account.
They emailed back and apologized and said they refunded the other $72 and asked me to sign up again at $99 and then use a special link they gave me which would credit me back the $99 and thus give me one year free Amazon Prime.
A bit convoluted, but free is free.
Of course as they say in Japan ただより高いものはない。