RAIN PAYMENT ISSUES

Morning. I recently ordered the Rain Sim deal for the 19Hours unlimited data. The 1st few days was running speeds up to 50mbps. but since much lower than normal. getting like 7 and 1.5 now. but at least still working. but my problem is that Rain has not debited my card yet and i dont want to get to a stage where they cut the service, as my son is using this on a daily basis for his college streaming. please advise banking details so that i can make payment directy or contact my to sort this issue out. *** - R Ganesh