Two debit orders for different amounts and no inv.

I have filled in the contact form twice and still no one has contacted me. 3 days ago and amount of R245 was deducted from my bank account with the reference of mrpmobile and an invoice number. My contract is supposed to be R99 per month. Then this morning another debit order goes off for R145 with the same invoice number. I still have not received this invoice and no call back from mrpmobile as I requested. I would like to know what these two debit orders are for and where is this invoice they keep referring to. I would like someone to contact me immediately and these funds reversed or an explanation of what this is for.