the urgent who was helping me this afternoon to process my upgrade to 5G route, told me that after receiving my router, I should I ask rain to cancel the current sim card, 4G and will credit me my balance

the urgent who was helping me this afternoon to process my upgrade to 5G route, told me that after receiving my router, I should I ask rain to cancel the current sim card, 4G and will credit me my balance. But when I call, the urgent is telling is not possible to cancel immediately and while I am still explaining why I end up bought 5G, he just put the phone down while I am still explaining. Now I am stucked with two unlimited wifi.