I was charged 40 per month before, but last month it's 70. I wonder why there is a sudden change and if there is a cheaper option to switch to.
Most likely your promotion/contract ended and now you're being charged every day pricing for your package. Notices of bill increases can be found in your billing statements, which you should be reading monthly when you get them. 😉
How about stop increasing pricing and start reducing rates for paying customers? At least during this pandemic?