Re-Instate Plan taken a month

Ive been trying to re instate a plan for my 67 year old mother since the 1st of MAY ... The policy is due to expire on the 31st. I was sent a mail on the 8 informing me of the re instatement , with policy a schedule attached.

Two day after that my mother received a message expressing that the policy is due to end on the 31st ? After i received the confirmation email.

She is 67 years old i please would like to avoid any gaps in her coverage. i have had her on this plan for a year and a half now .. Please can someone assist. I am the main member I HAVE A TOTAL OF THREE plans with dischem health.. its taken me a month to try and re instate ... And still no luck