Access codes are available automatically in the Control Center > Manage > Vouchers section in case you are using a Monthly Plan. In case of you are using the Pay As You Go Plan, you can generate your own vouchers under Manage > Vouchers.
NOTE: In case of a subscription model we only send you codes if you have used up most of the codes that we sent before. For example if you subscribe to HotSpot FREE 300, but you use only 100 codes in the first month, you won’t get another 300 codes automatically. We will send you the codes only if you use up almost all the codes (you’ll get the codes before you use up all so you’ll get a continuos service). So the number with the HotSpot FREE plans mean the maximum number of the codes you can use in a month.