Stressful cancer customer service

I have breast cancer and had a double mastectomy. Bestmed however don't understand that this is serious. They cancel the oncology codes regularly and then I have to fight to get accounts paid out of oncology benefits. It appears that they think that you have an op and all is fine. You require blood tests etc. every 4 months plus tablets daily for 5 years but they cancel the codes!!! The fact that I had a breast removed in 2018 ans 2019 does not appear to be important. So this is a heads up if you are unfortunate enough to get breast cancer and belong to Bestmed don't expect to receive your oncology benefits without a fight and an awful lot of stress. They need to upgrade their system and train their staff properly. They do send wonderfully polite emails in response to queries but don't actually solve the problem. Don't bother to send me the escalation email address as I have sent to it and it is useless. Very upsetting.