Please which data plan is best and and can last for one month

Gifting data

Can a 5gig monthly data plan rollover a 7gig weekly bundle. My 7gig weekly data bundle will expire tomorrow I wish to buy a 5gig monthly data plan so can the rollover be possible?

Wich data plans is the best and Wich plan is d best for calls

I purchased a monthly data bundle plan of 6500N through my zenith app and i have already contacted them and up till now i still haven't received the data bundle i have...