have been a customer for years, but the operation ...

have been a customer for years, but the operation is very poor, customer service does not respond or hardly responds to e-mails, only received 1 response after 3 e-mails and 3 months and then completely in addition to the issue, cannot be reached by telephone at all and if you have been a customer for years Apparently you have to send a registered letter another six months before the start date of your contract to say, very customer unfriendly company.