Has anyone had trouble with stereophile magazine?

I renewed my subcription for two years in January and have not been sent the last three issues. Their customer service department admitted that they had received my payment 2nd week of January. I would like to point out that I e-mailed them twice without response and had to call and wait on hold for 15-20 min. to get the information that I do have. I still do not have my issues and they will only send me jan,feb,mar if I pay extra for them. I hesitate to pay them anything in the future.