Customer service issues

I called 3 times to order long distance to an existing phone line for my mother, who is an 87 years old handicapped woman, she needs the service for emergency situations.
09/29/2023 The first time I got the order with confirmation numbers and a promised that service will be available within 24 hours, 2 days later I couldn’t use the service.
10/09/2023 I called again, she said the order didn’t go through, get a new order with confirmation number and promised the service will be available within 24 hours. 2 days later the service still not available.
10/13/2023 I called, again the order did not come through, she makes new order with new plan:
 instead of the plan that I selected on previous orders of 
$7.99/month + $0.07/minute
She said the only offer now is:
$45.84/month + $7.50 installation
She couldn’t answer why there’s no other offers(like the previous plan I selected)
A 87 years old handicapped women can’t afford the cost increased like that, we need to know why ? Can you explain ?